If the density of some lake water is 1.25 g mL-1 and contains 92 g of Na+ ions per kg of water, calculate the molality of Na+ ions in the lake

Question

If the density of some lake water is 1.25 g mL-1 and contains 92 g of Na+ ions per kg of water, calculate the molality of Na+ ions in the lake.

MARKS Content Team · Accepted Answer

Correct answer: 4. Molality of Na^(+) ions (m) = (Number of moles of Na^(+) ions)/(Mass of water in kg) =(92 g / 23 g mol^(−1))/(1 kg) = 4 mol kg^(−1) or 4 m

If the density of some lake water is 1.25 g mL^-1 and contains 92 g of Na⁺ ions per kg of water, calculate the molality of Na⁺ ions in the lake.

Solution

More Solutions Questions