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Preparation of 100ml of 1n Na2CO
Accepted Answer
To prepare 100 mL of a 1 N (Normal) solution of Na2CO3 (Sodium Carbonate), you'll need to consider its molecular weight and the definition of Normality. Here's a breakdown:
1. Molar Mass of Na2CO3: The molar mass of Na2CO3 is approximately 106 g/mol.
2. Normality (N): Normality is a measure of concentration defined as the number of gram-equivalent weights of solute per liter of solution. For Na2CO3, the equivalent weight is half the molecular weight because it can donate two moles of OH- ions per mole of Na2CO3.
3. Calculations:
Equivalent weight of Na2CO3: 106 g/mol / 2 = 53 g/equivalent
Mass of Na2CO3 needed: 1 N x 0.1 L x 53 g/equivalent = 5.3 g
4. Preparation:
Weigh out 5.3 grams of Na2CO3.
Dissolve the Na2CO3 in a small amount of distilled water in a 100 mL volumetric flask.
Carefully add distilled water to the flask until the volume reaches the 100 mL mark.
Ensure thorough mixing to ensure a homogeneous solution.
Remember to use analytical grade Na2CO3 for accurate results and to work safely in a laboratory setting.
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