2. Explain the effect of each of the following sources of error on the molarity

Question

2. Explain the effect of each of the following sources of error on the molarity of NaOH as NaOH obtained would determined in this experiment stating whether the concentration of be too high or too low. a. The buret is contaminated with an acid solution. b. The buret contains a large air bubble in the tip, which disappears in the course of the titration c. A small volume of the acid solution is spilled when you transfer it into the Erlenmeyer flask 3. Using the molarity of the NaOH solution obtained from your titration, calculate the molarity of a 26.0 mL of CH:COOH solution that requires 32.50 mL. of NaOH to reach the endpoint. 4. How many grams of NaOH are needed to prepare 500 mL of 0.124 M NaOH?

Explanation / Answer

2.

a)

Burette contaminated withn the acid will increase the molarity of acid if the acid is concentred than the the given acid and if it will be dilute than the given acid then it will decrease the molarity

b)

A large air bubble in the burrete will show a wrong measurement and will cause a decrease in the molarity of the given acid

c)

The spilled volume also show a decrease in the molarity of acid

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