Week 5 Exercises

Write down the dissolution equation for nickel(II) perchlorate dissolving in water. (Perchlorate is a polyatomic ion with the formula ClO41-.) If four moles of the ionic compound are dissolved, then how many moles of the ANION are present in the solution?

An aqueous solution contains 132.8 g of NaCI dissolved in enough water to make 1.000 x 10^3 mL of solution. What is the molar concentration of NaCI?

• 0.1531 M

• 2.620 M

• 2.272 M

• 0.1328 M

• 2.006 M

Given the following solubility product constant (Ksp​) values

Which of the following compounds is the most soluble (in moles per liter)?

• AgBr

• PbSO4

• BaCO3

• CoS

• BaSO4

Check ALL of the following substances which will conduct electricity in the form given:

• 1M HNO3 in water

• 0.1M glucose (sugar) water

• FeSO4(s)

• 0.1M solution of lithium sulfate

• sand

A solution is known to contain only one type of anion. Addition of Tl1+ ion to the solution had no apparent effect (all ions remained in solution), but addition of Ba2+ ion resulted in a precipitate. Which anion is present?

• none of the anions listed in the other choices are present

• SO4^2-

• NO3^1-

• Cl^1-

• I^1-

Question 6

Write the balanced chemical equation for the dissolution of ammonium nitrate. What is the coefficient in front of the solvated anion?

• 0

• 1

• 2

• 3

• 4

Select ALL of the following compounds which can be dissolved in water to prepare a 0.2 M aqueous solution. (Hint: use solubility rules)

• bismuth hydroxide

• lead(II) carbonate

• indium(III) sulfide

• iron(III) perchlorate

• calcium chloride

Ammonium bromide reacts with copper(I) sulfate in aqueous solution to form a solid precipitate. What is the net ionic equation for this reaction?

Choose the answer from picture above

• 1

• 2

• 3

• 4

• 5

Each of the following pairs of 0.2 M aqueous solutions are mixed. Which mixture results in the formation of a precipitate?

• calcium nitrate + cadmium chloride

• strontium bromide + silver acetate

• sodium acetate + potassium hydroxide

• lithium perchlorate + nickel(II) iodide