Question

15. In which pair of ions both the species containS – S bond?
(1) S₂O₇²⁻, S₂O₃²⁻
(2) S₄O₆²⁻, S₂O₃²⁻
(3) S₂O₇²⁻, S₂O₈²⁻
(4) S₄O₆²⁻, S₂O₇²⁻

Answer 1

Answer:

Choose your substance. Let's assume that it is the hydrochloric acid (HCl).

Find the molar mass of your substance. For the hydrochloric acid it is equal to 36.46 g/mol.

Decide on the mass concentration of your substance - you can either input it directly or fill in the boxes for substance mass and solution volume...

Convert the expressions above to obtain a molarity formula. As mass / volume = molarity * molar mass, then mass / (volume * molar mass) = molarity.

Substitute the known values to calculate the molarity: molarity = 5 / (1.2 * 36.46) = 0.114 mol/l = 0.114 M.