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Titration Qs (1 Viewer)

mtsmahia

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2010
Can someone please help with these Q's

1)Equal volumes of 4 different acids are titrated with 0.10 M NaOH solution @ 25 * C for complete reaction.

HCN pH: 5.0 Conc L 0.17 M

Ethanoic Acid pH: 3.0 Conc: 0.058 M

Sulphuric acid pH: 2.0 Conc: 0.010 M

Nitric acid ph: 1.0 Conc: 0.10 M

The acid requiring the greatest volume of 0.10 M NaOH for complete reaction is ?

The answer is HCN, can someone please explain how ?


2)
A Standard 0.0500 M Sodium Carbonate solution was prepared ans used to analyse an unknown nitric acid solution. The Volume of Sodium Carbonate solution used was 25.00mL.

1 titration - Volume of Nitric acid used was 22.65 mL

2- titration - 22.40 mL

3- titration- 22.35

4- 22.40
5- 22.38

Write a balanced equation for the reaction

Calculate the conc of the nitric acid solution


And also, when calculating the average titre, do u disregard the first titration?





Thanks
 

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