TCA 4 review guide: Solutions and Acid/Bases

Determine the charge of each ion:

• Cation is Positive. Anion is Negative

• Cation is Negative. Anion is Positive.

• Cation is Positive. Anion is Neutral.

• Cation is Negative. Anion is Neutral.

An electrolyte is:

• a substance that conducts electricity when dissolved in water

• a substance that does not conduct electricity in any state

• a type of metal

• a non-reactive gas

Dissociation is defined as:

• the process of breaking down a compound into its ions in solution

• the combination of two elements to form a compound

• the process of evaporation of a liquid

• the condensation of a gas into a liquid

In the diagram below, what is happening to the pink ion?

• Negative charges of Cl are attracting positive charges of H.

• Negative charges of Cl are repelling positive charges of H.

• Positive charges of Cl are attracting negative charges of O.

• Positive charges of Cl are attracting negative charges of O.

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At what temperature does the substance Z dissolve the fastest in water?

• 0°C

• 30°C

• 50°C

• 100°C

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How many grams of Z will dissolve in 100 grams of water at 20°C?

• 10 grams

• 15 grams

• 20 grams

• 30 grams

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The solubility of a salt in a given volume of water depends primarily on what?

• Temperature of the water

• Color of the salt

• Shape of the container

• Amount of light present

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The following reaction takes place in an aqueous solution. This reaction proceeds to completion because the reverse reaction is prevented by — CaCl2 (aq) + Pb(NO3)2 (aq) ⇌ Ca(NO3)2 + PbCl2

• an excess of CaCl2 solution

• the insolubility of PbCl2

• the low temperature of the solution

• an excess of Pb(NO3)2 solution

Water is considered an excellent solvent because:

• it has a high boiling point

• it is non-polar

• it can dissolve many substances due to its polarity

• it is colorless

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A 1 M solution contains 20 grams of solute in 500 milliliters of solution. What is the mass of 1 mole of the solute?

• 40 grams

• 20 grams

• 10 grams

• 80 grams