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Endpoint and equivalence points are often confused. Both are important stages of any titration experiment and have many differences. Like other titration terms such as titrants, analyte, burette, and pipette, endpoint and equivalence points are equally important in fully understanding the titration technique.

In a nutshell,

“Endpoint is the point in the titration process where the indicator changes its color whereas the equivalence point indicates the completion of the reaction between titrant (standard) and the substance being titrated (analyte).”

Endpoint is a volumetric point, achieved by carefully administering the number of drops of titrant, as a single drop can change the pH of the solution. Light pink color appearance or complete transparence of pink color means the endpoint in titrations when the phenolphthalein indicator is used eitherwise.

Consider this example where hydrochloric acid (HCl) is titrated against sodium hydroxide (NaOH):

HCl (aq) + NaOH (aq)  →    NaCl (aq) + H2O (l)

During the titration, NaOH is slowly added which results in neutralization with HCl or otherwise.

This point where the basic environment turns the phenolphthalein indicator pink is called the endpoint in this case. As soon as, the light pink color appears, the titration is complete. The endpoint is reached and no further NaOH is added for this titration.

It should be noted that different indicators can be used depending on the type of solution being used for titration. Litmus paper, methyl orange, and phenolphthalein, etc are commonly used indicators in laboratories.

In addition to indicators, a pH meter or conductivity meter can also be used to signal the completion of the reaction. In a neutralization reaction between a strong acid and a strong base, a pH of 7 would indicate that the reaction is complete.

Sometimes, a situation may come where the endpoint is passed, the solution then could be made to perform back titration depending on the nature of the solution.

Equivalence point indicates the completion of reaction where the number of moles of titrant equals the number of moles of analyte in the balanced chemical equation. In other words, exactly enough titrant has been added to react with all of the analyte.

For example, in the titration of NaOH and HCl, at the equivalence point, one mole of NaOH will be equal to one mole of HCl.

Titration of a base against an acid graph shapes like a rising curve. Initially, when the solution mixture is more acidic than basic, pH starts to rise gradually. After some volume of the base has been added, a point is reached which corresponds to the equal amount of acid and base in the mixture. This point is called equivalence point.

Titration of acid against a base is similar to the above one, except it has an opposite shape. Initially, when the mixture is just basic, the pH is high. Acid is added gradually into the base to nullify the basic effect. After some addition, a point arrives when the mixture seems to be neutral because the amount of acid and base is exactly equal.

If the titrant is kept being added to the mixture, the curves will proceed in an opposite manner to other pH sides, until the pH line becomes straight meaning that the whole mixture is now at the same pH level as the titrant.

Know more about pH calculations at the equivalence point here:

Related Topics

What is half equivalence point?

The half equivalence point is the point where half of the titrant needed for neutralization has been added to the flask form burette.

What is the difference between endpoint and stoichiometric point?

Stoichiometric point is another name of the equivalence point.

Why does endpoint occur after equivalence point?

The endpoint is the point where the indicator changes its color. The color change occurs at a point when the titration solution becomes basic. So after the complete neutralization at the equivalence point, the endpoint can be established.

Is the equivalence point always at pH 7?

When a strong acid neutralizes a strong base, the equivalence point is always at a pH 7. However, in the case of the reaction of weak acids with strong bases and weak bases with strong acids, the equivalence point is at pH > 7 and pH < 7 respectively.

Is endpoint the same as neutralization?

No. At the equivalence point, the neutralization reaction is complete. Whereas endpoint means the completion of the titration process or the indication of reaction completion.

What species are present at the equivalence point?

In acid-base titrations, salt and water are present at the point of equivalence.

What is the difference between the endpoint and equivalence point in a neutralization reaction?

The endpoint is simply the end of the titration reaction indicated by the change in color of the selected indicator. Whereas the equivalence point is a point at which exactly enough amount of titrant neutralizes the analyte.

How can you tell if you have exceeded the equivalence point in your titration?

Once you reach the endpoint, you can be sure that you have just passed the equivalence point. The titration mixture will have a pink color for (acid→base) or transparency for (base→acid), afterward, if the used indicator is phenolphthalein.

What is the midpoint of titration?

The point at which half of the analyte is neutralized by the added titrant is called the midpoint of titration.

Why do diprotic acids have two equivalence points?

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The Reds are team that is steeped in history and they are still fighting for some of football’s most prestigious prizes. Whether it’s battling Manchester City for the Premier League title, or going toe-to-toe with Real Madrid to claim the Champions League, fans can expect another season of thrills from Jurgen Klopp’s side.

With a guarantee of electrifying football at both ends of the pitch, and one of the most atmospheric grounds in the world, it’s no surprise that tickets to see Liverpool play are in high demand. Thankfully for Reds fans there are plenty of options to see the likes of Mohamed Salah, Trent Alexander-Arnold and Darwin Nunez in the flesh.

Liverpool offer a variety of tickets for fans, whether this is your first game or if you are a long-standing member of the club.

To purchase a ticket you must be a Liverpool FC member. Members of the club need to register for tickets and will be put into a ballot to be drawn for the game. Fans will then receive an email, if successful, to purchase tickets.

There are also options to buy tickets depending on how many games you have been to so far this season through the club’s points system.

The club also provides ‘local’ sale tickets for anyone with a postcode starting with ‘L’. Available several days before the match, fans can register for tickets through the club’s website which are subject to availability.

Unsurprisingly, demand is often high, leaving many fans to head to resale sites such as stubhub.co.uk in their efforts to bag tickets.

In order to purchase an official ticket through the club to see Liverpool play at Anfield, you must be a member of the club.

There are two types of Liverpool FC memberships -Adults (ages 16+) and Juniors (0-16). Adult memberships start from £26.99 a year, while Junior memberships start from £19.99.

Memberships offer fans a range of benefits from access to an allocation of tickets to exclusive Liverpool FC content and benefits throughout the season.

The best way to guarantee a seat at Anfield is by purchasing a season ticket.

Season tickets are available to purchase via the Liverpool website before the start of the season and one entitles you to a designated seat for every game. Fans can choose their seats for the season in any of the stands, ensuring that you never miss a moment of the action.

However, it should be noted that the club currently has a long waiting list to purchase season tickets which stretches into the thousands and is no longer accepting any new applications.

There are several hotels for visitors to stay around Anfield stadium, and others continually opening up. The interactive map below shows what is available within the immediate vicinity of the ground, although many visitors also choose to stay in the city centre which is only a short taxi or bus ride away.

For the full match-day experience at Anfield nothing beats making use of the hospitality options.

Fans have access to seven different packages, whether you want to enjoy the food and drink at The Carlsberg Dugout or go for the full four-course meal at The Beautiful Game restaurant.

Each hospitality option comes with drinks and canapes on arrival, half-time refreshments and the chance to meet a former Liverpool player, plus watching a thrilling game from some of the best seats in the house.

To find the best deals on Liverpool’s hospitality packages, TravelZoo offer a wide range of promotions for fans to make the most out of their match-day experience. TravelZoo source the top deals, no matter what experience you are looking for, thanks to their partnerships with over 5,000 top travel suppliers.

Go to travelzoo.com/uk/collection/specials to find hospitality tickets for the latest Liverpool fixtures.

Hospitality tickets for the first half of the season usually go on sale in early July. So, bookmark this page for further updates, which we'll share once available. And if you miss out on those, no worries, you can still get tickets for the second half of the season - usually on sale in early November - for all the remaining games.

However, there are still some hospitality tickets available for the rest of this season, which can be found on the Liverpool FC Hospitality page.

Over recent seasons Liverpool has enjoyed plenty of success in the Champions League under Jurgen Klopp – including the historic win against Spurs in 2019.

Thanks to the club’s recent finishes in the Premier League the Reds have cemented their place among Europe’s elite and there are few better footballing atmospheres in the world than Anfield.

Tickets for all of Liverpool's cup games, including the Champions League and FA Cup, are available via the club’s Auto Cup Scheme. This allows both official members and season ticket holders to secure home tickets throughout the season when they become available.

Much like the regular season home games these tickets are available for Liverpool FC members and season ticket holders only.

The best way to guarantee a seat at Anfield is by purchasing a Liverpool season ticket.

Season tickets are available to purchase via the Liverpool website before the start of the season and one entitles you to a designated seat for every game. Fans can choose their seats for the season in any of the stands, ensuring that you never miss a moment of the action.

However, it should be noted that the club currently has a long waiting list to purchase season tickets which stretches into the thousands and is no longer accepting any new applications.

Getting Liverpool away tickets can be challenging due to high demand and limited availability. The process for obtaining away tickets can vary depending on the competition, opposition, and location of the game.

The first step is to become a Liverpool FC member, which can increase your chances of obtaining an away ticket. Members get priority access to tickets, and those who have attended away games in the past are given preference.

Once you become a member, you can register your interest in attending specific away games on the club's website or through the official ticketing office. If your application is successful, you will be notified by email or text message and provided with further instructions on how to purchase your ticket.

It's worth noting that the club allocates away tickets based on a loyalty point system. This means that members who have attended more away games or have been a member for a longer period will have a higher chance of obtaining a Liverpool ticket.

Being one of the most popular Premier League clubs leads to high demand for tickets, making getting a Liverpool ticket of your own a tough task. This means that tickets for high-profile games or matches against top teams are likely to sell out quickly, and fans may have to act fast to secure their seats.

Additionally, the club often implements measures to prevent ticket scalping and ensure fair access to tickets, which can make it more challenging to obtain them.

The time when Liverpool tickets go on sale can vary depending on the specific game, competition, and other factors. However, in general, Liverpool FC typically releases tickets for sale several weeks before the match.

For Premier League matches, the tickets usually go on sale around four to six weeks before the game, although this can vary depending on the popularity of the fixture. For high-profile games against top teams, tickets may sell out quickly, and the club may release them earlier to give fans a chance to secure their seats.

For cup competitions, such as the FA Cup or the Champions League, the ticket sale dates can vary even more. The club usually announces the ticket sale dates on their official website and social media channels, giving fans ample time to plan and prepare.

Getting cheap Liverpool tickets can be challenging, as demand for tickets is usually high, especially for high-profile games or matches against top teams. However, there are several strategies you can use to increase your chances of finding affordable tickets.

Overall, finding cheap Liverpool tickets can be challenging, but with some planning and research, you can increase your chances of finding a good deal. It's important to be aware of any additional fees or charges and to only buy tickets from reputable sources to avoid scams or fraud.

Anfield Stadium, the home of Liverpool Football Club, is located in the Anfield area of Liverpool, England. There are several ways to travel to Anfield, depending on your preferences and location.

One popular option is to take public transportation. The nearest train station to Anfield is Kirkdale, which is about a 15-minute walk from the stadium. You can also take a bus or a taxi from Liverpool city centre or other nearby locations.

If you prefer to drive, there are several parking options available in the area. However, parking can be limited on matchdays, so it's best to arrive early if you plan to drive. Alternatively, you can take advantage of the park-and-ride services provided by the club or use one of the official car parks located close to the stadium.

Another option is to book a matchday travel package, which may include transport to and from the stadium, as well as other perks such as access to the club's lounges or pre-match meals.

Overall, the best way to travel to Anfield depends on your individual circumstances and preferences. It's best to plan ahead and consider all the available options to ensure a smooth and stress-free journey to the stadium.

There are several hotels for visitors to stay around Anfield Stadium, and others continually opening up. The interactive map below shows what is available within the immediate vicinity of the ground, although many visitors also choose to stay in the city centre, which is only a short taxi or bus ride away.

There are several websites across the internet that offer deals and discounts on Anfield stadium tours.

RedLetterDays currently offer stadium tours from £46 for two or from £37 for one adult and one child. The tour lasts approximately one hour and as well as access to The Boot Room Cafe and The Liverpool FC Story museum, also takes you around the famous stadium where the guide will take those in attendance through a journey of 125 years of the club's history.

On the same website, you can also buy an "Anfield Experience" where you will get a three-course lunch and a Q&A session with a legend from Liverpool's past. Click here to discover more.