Complete symbol equation for BaCl2 + Na2SO4 reaction. Include state symbols.

Calculate the mass of solid BaCl2 dissolved in step 1.

Calculate volume of Na2SO4 solution needed containing 0.100 moles.

State the colour of the solid formed in step 2.

State the general term given to a solid left in the filter paper after filtration.

Suggest what student should do between step 3 and 4, and why mass is greater.

State the name of this method of salt preparation.

Name alternative barium salt, sulfate salt, and insoluble barium salt.