Unit 7 - Solutions

When are Group 1 ion soluble in water?

• never

• always

• only when combined with other Group 1 ions

• only when combined with carbonate

Is lead II bromide soluble in water?

• Yes

• No

Is ammonium phosphate soluble in water?

• Yes

• No

Is calcium carbonate soluble in water?

• Yes

• No

According to Table F, which of these salts is

least soluble in water?

• LiCl

• FeCl₂

• RbCl

• PbCl₂

Based on Reference Table F, which of these saturated solutions has the lowest concentration of dissolved ions (least soluble)?

• NaCl(aq)

• NiCl₂(aq)

• MgCl₂(aq)

• AgCl(aq)

According to Reference Table F, which of these compounds is the least soluble in water?

• K₂CO₃

• KC₂H₃O₂

• Ca₃(PO₄)₂

• Ca(NO₃)₂

Identify one ion from Table F that can combine with Pb²⁺(aq) to produce an insoluble compound.

• Cl^-

• NO₃^-

• ClO₃^–

• all of these are insoluble

At STP, which of these substances is most soluble in H₂O? (Remember: likes dissolve likes)

• CCl₄

• HCl

• CO₂

• N₂

In a gas to liquid mixture, an increase in temperature means...

• increase in solubility
• decrease in solubility