Question

class 12 ncert chemistry chapter 2 exercise question no. 26​

Answer 1

Answer:

Explanation:

Qn: If the density of some lake water is 1.25g/ml and contain 92g f Na+ ions per kg of water. Calculate the molality of Na+ ions in the lake.

Soln:

Molar mass of Na= 23g/mol

Therefore, No.of moles of Na+ ions present= 92/23= 4moles

Therefore, Molality= 4*1000/1000=4m.....