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Citrate Buffer Preparation Quiz

Created by

@SeamlessSousaphone

Questions and Answers

What pH value is associated with the prepared Citrate buffer before any adjustments are made?

4.8 (correct)

5.5

2.0

3.0

How much sodium citrate solution is needed to prepare the 0.1M Citrate buffer?

5 ml

2.941 gm

2.101 gm

3.5 ml (correct)

Which of the following steps is NOT part of preparing the Citrate buffer solution?

Adding sodium citrate first to the acid (correct)

Adjust the pH with hydrochloric acid and sodium hydroxide

Dissolve 2.941 gm of sodium citrate in 100 ml distilled water

Dissolve 2.101 gm of citric acid in 100 ml distilled water

What is the mass of citric acid required for preparing the Citrate buffer?

2.101 gm Signup and view all the answers

In preparing the Carbonate - Bicarbonate buffer, how much anhydrous sodium carbonate is required for a 0.2M solution?

2.12 gm Signup and view all the answers

What is the final pH of the citrate buffer after adjustments?

2.5 Signup and view all the answers

Which reagent is mixed with citric acid to create the citrate buffer?

Sodium Citrate Solution Signup and view all the answers

How is the concentration of the citrate buffer described in the procedure?

0.1M Signup and view all the answers

To achieve a pH of 2.5, which two solutions are used for adjustment?

IN HCl and 5N NaOH Signup and view all the answers

What is the initial preparation step for the sodium carbonate solution in the carbonate-bicarbonate buffer?

Dissolve in distilled water Signup and view all the answers

Study Notes

Citrate Buffer

Reagents Needed:
- Citric acid: 2.101g dissolved in 100ml distilled water.
- Sodium citrate solution (0.1M): 2.941g dissolved in 100ml distilled water.
Preparation Procedure:
- Mix 46.5ml of citric acid with 3.5ml of sodium citrate solution.
- Add distilled water to reach a total volume of 100ml.
- This creates a 0.1M citrate buffer.
pH Measurement:
- Standardize the solution using a pH meter to measure the pH.
- Initial pH was measured at 4.8.
- Adjust the pH to the desired 2.5 using IN HCl and 5N NaOH.

Carbonate-Bicarbonate Buffer

Reagents Needed:
- Sodium carbonate solution (0.2M): 2.12g of anhydrous sodium carbonate dissolved in 100ml distilled water.

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Description

Test your knowledge on preparing a citrate buffer using citric acid and sodium citrate. This quiz will cover the reagents required, the procedure for preparation, and the importance of pH measurement. Perfect for students learning about buffer solutions in chemistry!