Question

When we dissolve 15.8g of KMnO4 in 1000g of H2O. The solution is.
0.1 m
0.1 M
0.2 m
0.2 M​

Answer 1

Answer:

correct

Explanation:

correct answer is C

Answer 2

Answer:

0.1m & 0.1M both

Explanation:

15.8 gm KMnO4 = 15.8/158 = 0.1 mol

Now, 1). molarity is no of mol dissolve in 1 litre solution.

Here volume of water is 1 litre ( density of water 1gm/ml)

0.1 mol kmno4 dissolved 1 litre solution, so molarity will be 0.1 M

2). Molality is no of mol dissolve in 1 kg of solvent.

Here 0.1 mol solute dissolved in 1 kg solvent, so molality will be 0.1 m