Question

If you have 16 g of manganese (II) nitrate tetrahydrate, how much water is required to prepare 0.16 M solution from this amount of salt?

Answer 1

Answer: The amount of water required to prepare given amount of salt is 398.4 mL

Step-by-step explanation:

To calculate the volume of solution, we use the equation used to calculate the molarity of solution:

`\text{Molarity of the solution}=\frac{\text{Mass of solute}* 1000}{\text{Molar mass of solute}* \text{Volume of solution (in mL)}}`

We are given:

Molarity of solution = 0.16 M

Given mass of manganese (II) nitrate tetrahydrate = 16 g

Molar mass of manganese (II) nitrate tetrahydrate = 251 g/mol

Putting values in above equation, we get:

`0.16M=\frac{16* 1000}{251* \text{Volume of solution}}\\\\\text{Volume of solution}=(16* 1000)/(251* 0.16)=398.4mL`

Volume of water = Volume of solution = 398.4 mL

Hence, the amount of water required to prepare given amount of salt is 398.4 mL