Solution : QNo. 4
Here's how to determine the molarity of the solution step-by-step:
1. **Calculate the number of moles of NaOH:**
* Given mass of NaOH = 2.46 g
* Molar mass of NaOH = 40 g/mol
* Number of moles = Mass / Molar mass
* Number of moles = 2.46 g / 40 g/mol = 0.0615 mol
2. **Convert the volume of the solution from cm³ to Liters:**
* Given volume = 100 cm³
* Since 1 cm³ = 1 mL, the volume is 100 mL.
* To convert mL to Liters, divide by 1000: 100 mL / 1000 = 0.1 L
3. **Calculate the Molarity of the solution:**
* Molarity (M) = Moles of solute / Volume of solution in Liters
* Molarity = 0.0615 mol / 0.1 L
* Molarity = 0.615 mol/L
Therefore, the molarity of the solution is **0.615 M**.
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