A titration is a procedure for determining the concentration of a solution by al

Question

A titration is a procedure for determining the concentration of a solution by allowing it to react with another solution of known concentration (called a standard solution). Acid-base reactions and oxidation-reduction reactions are used in titrations. For example, to find the concentration of an HCl solution (an acid), a standard solution of NaOH (a base) is added to a measured volume of HCl from a calibrated tube called a buret. An indicator is also present and it will change color when all the acid has reacted. Using the concentration of the standard solution and the volume dispensed, we can calculate molarity of the HCl solution.

Part A

A volume of 50.0 mL of aqueous potassium hydroxide (KOH ) was titrated against a standard solution of sulfuric acid (H2SO4 ). What was the molarity of the KOH solution if 19.2 mL of 1.50 M H2SO4 was needed? The equation is

2KOH(aq)+H2SO4(aq)K2SO4(aq)+2H2O(l)

Express your answer with the appropriate units.

Explanation / Answer

we all know the formula V1S1=V2S2 ,where V is volume and S is strength of solution that is normality.Now normality of H2SO4 =1.50*2=3(N),and all volumes are given.so according to V1S1=V2S2

50 ml * S1=19.2ml * 3(N)

S1=1.152(N)

now for KOH normality and molarity is same so the molarity of KOH=1.152(M)

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