Equivalent mass of Na₂CO₃ in the above equation will be.

• A) 106
• B) 53
• C) 26.5
• D) 13.25

To determine the equivalent mass of sodium carbonate (Na₂CO₃), we first need to understand its molar mass and how it dissociates in reactions.

Molar Mass Calculation

The molar mass of Na₂CO₃ can be calculated as follows:

• Sodium (Na): 23 g/mol × 2 = 46 g/mol
• Carbon (C): 12 g/mol × 1 = 12 g/mol
• Oxygen (O): 16 g/mol × 3 = 48 g/mol

Adding these together gives:

46 + 12 + 48 = 106 g/mol

Finding Equivalent Mass

The equivalent mass is calculated by dividing the molar mass by the number of equivalents. For Na₂CO₃, it can donate two moles of Na⁺ ions in reactions, so:

Equivalent mass = Molar mass / Number of equivalents

Thus, we have:

Equivalent mass = 106 g/mol / 2 = 53 g

Final Answer

Therefore, the equivalent mass of Na₂CO₃ is 53, which corresponds to option B.