Writing Chemical Formulae

Using criss-cross method, write the formula for the compound that is formed and name the compound.

${\mathrm{Sn}}^{4+} {\mathrm{S}}^{2-}$

Using criss-cross method, write the formula for the compound that is formed and name the compound.

${\mathrm{Ca}}^{2+} {\mathrm{HSO}}_4^{-}$

Using criss-cross method, write the formula for the compound that is formed and name the compound.

${\mathrm{NH}}_4^{+} {\mathrm{HPO}}_4^{2-}$

Using criss-cross method, write the formula for the compound that is formed and name the compound.

${\mathrm{K}}^{+} {\mathrm{OH}}^{-}$

Using criss-cross method, write the formula for the compound that is formed and name the compound.

${\mathrm{Ag}}^{+} {\mathrm{Br}}^{-}$

Write the formulae of plumic chloride.

Write the formulae of cuprous oxide.

Give the name of the following compound and derive the formula by using criss-cross method.

${\mathrm{Na}}^{+} {\mathrm{HSO}}_4^{-}$

Give the name of the following compound and derive the formula by using criss-cross method.

${\mathrm{NH}}_4^{+} {\mathrm{P}}^{3-}$

Give the name of the following compound and derive the formula by using criss-cross method.

${\mathrm{Al}}^{3+}{\mathrm{O}}^{2-}$

The equivalent mass of an element A is $\mathrm{x}$. $\mathrm{x}$ grams of A react with $\mathrm{y}$ grams of another element B. If the valency of B in the product is $2$, what is the atomic mass of B?

$\mathrm{x}$ grams of a metal react with $32 \mathrm{g}$ of oxygen and the atomic weight of the metal is $0.5\mathrm{x}$. Calculate the valency of the metal.

Write the formula of sodium oxide and aluminium chloride.

Write the molecular formulas of the following compounds.

• Stannic oxide 
• Ferrous tungstate
• Copper pyrite
• Cryolite

Which of the following is the formulae of stannic phosphate?

What is the molecule formula for methanol? 

What is the chemical formula of lithium astatide ?

Write chemical formulae for the following:
Zinc hydroxide
Zinc chloride
Zinc carbonate
Zinc sulphate
Zinc nitrate

Copper sulphate on treatment with Potassium iodide precipitates cuprous Iodide $\left({\mathrm{Cu}}_2{\mathrm{I}}_2\right)$, liberates Iodine gas and also forms potassium sulphate. Explain the formation of formula of Cuprous Iodide by criss-cross method. (The valency of Cuprous is one)

Determine the chemical formula of magnesium chloride.