The number of H ions in 990 liters of water is 3.01 * 10 ^ 17. Determine how many water molecules

The number of H ions in 990 liters of water is 3.01 * 10 ^ 17. Determine how many water molecules there are per one dissociated water molecule per ions.

ρ (H2O) = 1000 g / l;

Number of molecules: N = Na * n; Na = 6.02 * 10 ^ 23;

n = m / M;

M (H2O) = 18;

M = ρ * V = 990 * 1000 = 9.9 * 10 ^ 5;

N = 9.9 * 105 * 6.02 * 10 ^ 23/18 = 3.31 * 10 ^ 28 – the number of water molecules in total – dissociated and non-dissociated.

The number of dissociated molecules is two times less than H +, since the formula of water is H2O.

The number of undissociated H2O molecules per one dissociated:

N (undissociated) = (2 * 3.31 * 10 ^ 28) / 3.01 × 10 ^ 17 = 2.2 * 10 ^ 11.