SCA #5 Review

Use the solubility diagram to answer the following question. Which term correctly describes a solution containing 50 g sodium chloride/100g H2O at 60°C?

• subsaturated

• saturated

• supersaturated

• unsaturated

The reading of a pH meter is a measure of —

• hydronium ion concentration

• lithium ion density

• magnesium ion radioactivity

• ammonium temperature

Determine the pH of a solution that has a hydrogen ion concentration of 6.3 x 10-6.

• -6.8

• -0.80

• 0.80

• 5.2

The base Ba(OH)2 neutralizes the acid H2SO4. Which salt is produced?

• BaH2

• BaSO4

• BaH2S

• BaO4

For two acids of equal concentration, the stronger acid has —

• a higher concentration of hydroxide ions

• a higher pH

• a higher concentration of hydronium ions

• a stronger bond

According to the Brønsted–Lowry definition of acids-base reaction, acids have the ability to-

• "donate" hydrogen ions

• “donate” hydroxide ions

• “accept” hydrogen ions

• “accept” hydroxide ions

Stronger acids are those that —

• hold on to their protons more strongly

• lose their protons more easily

• more completely inhibit polarity in water

• exhibit hydrogen bonding

Which of the following shows the behavior of an Arrhenius acid?

• NaOH →Na+ + OH–

• NH3 + H2O → NH4

  + + OH-

• Ca(ClO3)2→ Ca+2 + ClO3

• HBr → H+ + Br-

A solute is added to water and a portion of the solute remains undissolved. When equilibrium

between the dissolved and undissolved solute is reached, the solution must be —

• unsaturated.

• saturated.

• supersaturated.

• dilute.

Use solubility rules to determine the missing states of matter in the equation below.

(NH4)2Cr2O7 (aq) + Ca(OH)2 (aq) --> 2 NH4OH (?) + CaCr2O7 (?)

Which product is insoluble?

• (NH4)2Cr2O7

• Ca(OH)2

• NH4OH

• CaCr2O7