[skanta479]

Need some desperate help with this IGCSE question. Its in four parts and if someone could go through it step by step that would be amazing, explaining why they are using that particular method/calculation.

(d) 10.0 cm3 of a concentrated solution of sulfuric acid was carefully diluted with water.
More water was then added until the final volume of the solution was 1.00 dm3 (1000 cm3).
In an experiment, a student found that 25.0 cm3 of the diluted sulfuric acid reacted
with 30.00 cm3 of sodium hydroxide solution.

The concentration of the sodium hydroxide solution was 0.200 mol/dm3.

The equation for the reaction is:

2NaOH + H2SO4 → Na2SO4 + 2H2O

(i) Calculate the amount, in moles, of sodium hydroxide in 30.00 cm3 of a solution
of concentration 0.200 mol/dm3.

Amount of sodium hydroxide = .. mol

(ii) Using your answer to (d)(i), calculate the amount, in moles, of sulfuric acid in
25.0 cm3 of the diluted acid.

Amount of sulfuric acid in 25.0 cm3 = .. mol

(iii) Using your answer to (d)(ii), calculate the concentration, in mol/dm3, of the
diluted sulfuric acid.

Concentration of the diluted sulfuric acid = .. mol/dm3

(iv) Using your answer to (d)(iii), calculate the concentration, in mol/dm3, of the
original, concentrated sulfuric acid.

Concentration of the original, concentrated acid = .. mol/dm3

[Borek]

You have to show your attempts at solving the question to receive help. This is a forum policy.