Monitoring chemical reactions

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Question 6

Medium

A student performs a titration to determine the exact concentration of a sodium hydroxide solution using dilute sulfuric acid.

Complete the word equation for this neutralization reaction:

$hydroxide→………………+………………\text{sulfuric acid} + \text{sodium hydroxide} \rightarrow \text{\dots\dots\dots\dots\dots\dots} + \text{\dots\dots\dots\dots\dots\dots}$

[2]

The student writes down the following method for their experiment:

Use a measuring cylinder to transfer $cm325.0\text{ cm}^3$ of the sodium hydroxide solution into a beaker.
Add $3$ drops of methyl orange indicator to the beaker.
Fill a burette to the $cm30.0\text{ cm}^3$ mark with the dilute sulfuric acid.
Run the sulfuric acid from the burette in $cm32.0\text{ cm}^3$ portions into the beaker, stirring occasionally, until the indicator changes color.
Repeat the experiment.

Describe and explain one improvement the student should make to this method to obtain a more accurate titration result.

[2]

The student repeats the titration four times. The results are shown in the table below:

Titration number	1 (Rough)	2	3	4
Volume of acid added ( $cm3\text{cm}^3$ )	25.10	24.15	24.25	24.20

Calculate the accurate volume of sulfuric acid that reacted with the sodium hydroxide.

[2]

Monitoring chemical reactions

Question 6

Monitoring chemical reactions Questions

Monitoring chemical reactions

Question 6

Monitoring chemical reactions Questions