FORM 2 CHEMISTRY

give the name of the salt that dissolves only when hot

why is excess calcium carbonate added to dilute nitric (V) acid during the preparation of calcium nitrate?

• to ensure that all the acid has reacted

• to remove exess calcium carbonate

• to ensure that all the calcium carbonate has reacted

• to ensure that the salt is formed faster

give a reason why filtration is done during preparation of salt crystals

• to ensure that all the solid has reacted

• to ensure that all the acid has reacted

• to remove excess solid

• to ensure that the salt is formed faster

what colour does the solution turn when sulphuric (VI) acid is added to copper (II) carbonate

• clear

• green

• blue

• purple

complete the equation below. metal + acid =

name the type of reaction that produces an insoluble salt

salts prepared with hydrochloric acid are called?

• chlorides

• Cl-

how do you separate an excess insoluble reactant from a solution?

• precipitation

• filtration

• crystallization

• evaporation

which of the following salts can be prepared by double decomposition method?

• silver chloride

• sodium carbonate

• Barium nitrate

• lead (II) nitrate

which of the following are the physical characteristics of a salt crystal?

I. they have similar size

II. they have fixed angles

III. they have fixed geometrical shapes

IV. they have flat surfaces, straight edges and sharp angles.

• I, II and III

• I, III and IV

• I, II and IV

• II, III and IV