Question

When water is added to solids to prepare a solution, the volume of the solution is not necessarily the same as the volume of the water added. For dilute solutions the two volumes are very similar. Assuming the volume of solutions prepared is 10.0 mL calculate the following based on the mass 0.2610 of ammonium sulfate.

1. The molarity of ammonium sulfate in the solution expressed to 3 decimal places.

2. the molarity of ammonium ions in the solution

3. the molarity of sulate ions in the solution

4. the molarity of dilute ammonium sulfate solution inside 300 mL (299 mL deionized water and 1 mL of above solution).

Answer 1

Mass of ammonium sulfate added is 0.2610 g

Anonea Melaity 4solult Molar mamselulr man vot nseluten CmL) Soluti is Ammoniunslat 132 14 9 nalan man mol Melui ty 0.2610 132.14 9me (oo0 10 mL o.197 M Anona 2 Ammo nim sulati (NHu)con duseciaten ann- 2NH4t +SOu 2- NHy),604 As, Imol NH4) soy Malany NHy 2 males n NHyt toums Melauty NH2 04 2x 0.197M 0.394 M Anone 3 Imel yNH, coy fouma 1mol Sou melauty co4 0 197M 2- Melau'ty 1sou

Anons 1 A watu is addud to Iml euiginal ImL 0.001 L Volumne n iginal solutenn telcen 1oo O.600197 Ynol Total valumi 300ml War dikutien 300 1000 0.3L o. 000197 mol Motauty diubd selutien o.3L 0 e0o65 7M