100ml of decinormal solution of HCl contains how many grams of HCl. a) 3.65 b)36.5 c)0.365 d)0.1825?

Question

Answer

Answer

One litre of decinormal solution contains 0.1 Mole. 100 ml contains 0.01 mole.Or it contains 0.365 mole.

Answer

**Calculating the grams of HCl in a decinormal solution**

To calculate the grams of HCl in a decinormal solution, we need to first understand the concept of decinormality and the molar mass of HCl.

**Decinormality:**

Decinormality is a unit of concentration used in analytical chemistry. It represents one-tenth (1/10th) of a normal solution. A normal solution is defined as a solution that contains one equivalent weight of solute per liter of solution.

**Molar mass of HCl:**

The molar mass of HCl is the sum of the atomic masses of hydrogen (H) and chlorine (Cl). The atomic mass of hydrogen is approximately 1 gram/mol, and the atomic mass of chlorine is approximately 35.5 grams/mol. Therefore, the molar mass of HCl is approximately 36.5 grams/mol.

**Calculating the grams of HCl:**

To calculate the grams of HCl in a decinormal solution, we can use the following formula:

Grams of HCl = Molarity × Volume (in liters) × Molar mass of HCl

Given that the solution is decinormal, its molarity can be calculated by dividing the molarity of a normal solution by 10.

Molarity of decinormal solution = Molarity of normal solution /10

In this case, the decinormal solution is HCl, so the molarity of the normal solution is 1 M (since HCl is a monoprotic acid).

Therefore, the molarity of the decinormal solution is 1 M / 10 = 0.1 M.

Now, we can substitute the values into the formula:

Grams of HCl = 0.1 M × 0.1 L × 36.5 g/mol

Grams of HCl = 0.365 g

**Answer:**

Therefore, 100 ml of a decinormal solution of HCl contains 0.365 grams of HCl.

The correct answer is option (c) 0.365.

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