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If 15 ml of KOH is neutralized by 25 ml of H2SO4, how much KOH is required to neutralize 40 ml of the same H2SO4 solution?
24 ml
20 ml
30 ml
18 ml
24 ml
Neutralization reactions follow the law of chemical equivalence, where the equivalents of acid equal the equivalents of base (N1тАЛV1тАЛ=N2тАЛV2тАЛ). Since the concentration of the solutions remains constant, the volume of KOH required is directly proportional to the volume of the HтВВSOтВД solution.
Neutralization reactions follow the law of chemical equivalence, where the equivalents of acid equal the equivalents of base (N1тАЛV1тАЛ=N2тАЛV2тАЛ). Since the concentration of the solutions remains constant, the volume of KOH required is directly proportional to the volume of the HтВВSOтВД solution.
Think of it like a recipe where a fixed ratio of ingredients is always required; if you increase the amount of one ingredient by a certain factor, the other must increase by the exact same multiplier.
N1тАЛV1тАЛ=N2тАЛV2тАЛ тАФ Normality equation for neutralization
n1тАЛM1тАЛV1тАЛтАЛ=n2тАЛM2тАЛV2тАЛтАЛ тАФ Stoichiometric neutralization formula
The balanced chemical equation for the neutralization of potassium hydroxide by sulfuric acid is 2KOH+H2тАЛSO4тАЛтЖТK2тАЛSO4тАЛ+2H2тАЛO. Using the normality relation NKOHтАЛVKOHтАЛ=NH2тАЛSO4тАЛтАЛVH2тАЛSO4тАЛтАЛ, we set up the direct proportion where VKOHтАЛ=(15ml/25ml)├Ч40ml=24ml.
Neutralization is a chemical reaction between an acid and a base producing salt and water.
Sulfuric acid (H2тАЛSO4тАЛ) is a diprotic acid, meaning each mole releases two moles of hydrogen ions.
Direct proportionality applies when comparing volumes of the same concentration solutions.
Acid-base titration in analytical chemistry
Determining unknown concentrations in industrial processes
Standard value: Sulfuric acid has a normality twice its molarity due to its two replaceable hydrogen ions.
Options B, C, and D are incorrect calculations resulting from improper stoichiometric scaling.
A is correct тАФ 24 ml of KOH is required to neutralize 40 ml of the given H2SO4 solution.
Always verify the basicity of acids and acidity of bases before applying volume-concentration formulas in titration numericals.
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