Question:
How many gram-equivalents of $ NaOH $ are required to neutralise $ 25 \,cm^3 $ of a decinormal $ HCl $ solution?
How many gram-equivalents of $ NaOH $ are required to neutralise $ 25 \,cm^3 $ of a decinormal $ HCl $ solution?
Updated On: Feb 9, 2024
- $ 0.00125 $
- $ 0.0025 $
- $ 0.0050 $
- $ 0.025 $
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The Correct Option is B
Solution and Explanation
For acid-base reactions,
$\underset{(HCl)}{\text{g-equivalent of acid}} $ $\underset{(NaOH)} {\text{=g-equivalent of base}}$
$\therefore$ g -equivalent of acid $=\left(25 \times 10^{-3}\right) dm ^{3} \times \frac{1}{10}$
$=25 \times 10^{-4}$
or $=0.0025$
$=g$ -equivalent of $NaOH$
$\underset{(HCl)}{\text{g-equivalent of acid}} $ $\underset{(NaOH)} {\text{=g-equivalent of base}}$
$\therefore$ g -equivalent of acid $=\left(25 \times 10^{-3}\right) dm ^{3} \times \frac{1}{10}$
$=25 \times 10^{-4}$
or $=0.0025$
$=g$ -equivalent of $NaOH$
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Concepts Used:
Solutions
A solution is a homogeneous mixture of two or more components in which the particle size is smaller than 1 nm.
For example, salt and sugar is a good illustration of a solution. A solution can be categorized into several components.
Types of Solutions:
The solutions can be classified into three types:
- Solid Solutions - In these solutions, the solvent is in a Solid-state.
- Liquid Solutions- In these solutions, the solvent is in a Liquid state.
- Gaseous Solutions - In these solutions, the solvent is in a Gaseous state.
On the basis of the amount of solute dissolved in a solvent, solutions are divided into the following types:
- Unsaturated Solution- A solution in which more solute can be dissolved without raising the temperature of the solution is known as an unsaturated solution.
- Saturated Solution- A solution in which no solute can be dissolved after reaching a certain amount of temperature is known as an unsaturated saturated solution.
- Supersaturated Solution- A solution that contains more solute than the maximum amount at a certain temperature is known as a supersaturated solution.