Match each sulfate salt solution with the corresponding number of sulfate ion moles. Assume all salts dissolve in water.
-500 mL of 0.0002 M ammonium sulfate solution

Question

Quizplus · Accepted Answer

Ammonium sulfate dissociates in water to give one ammonium ion (NH4+) and one sulfate ion (SO42-). The concentration given is 0.0002 M, which refers to the concentration of the total salt, not just the sulfate ion. Therefore, to find the number of sulfate ion moles, we need to multiply the concentration by the number of sulfate ions per ammonium sulfate molecule, which is 1.

moles of sulfate ion = concentration x volume in liters x number of sulfate ions per molecule
moles of sulfate ion = 0.0002 M x 0.5 L x 1
moles of sulfate ion = 0.0001 mol

Therefore, the correct answer is B, which corresponds to 0.0001 sulfate ion moles.

Match Each Sulfate Salt Solution with the Corresponding Number of Sulfate