Q102P - Chemistry: Molecular Nature Of Matter And Change

Question

Correct the name to match the formula of the following compounds:

(a) Calcium (II) dichloride,${\mathbf{CaCI}}_{\mathbf{2}}$;

(b) Copper (II) oxide, ${\mathbf{Cu}}_{\mathbf{2}}\mathbf{O}$;

(c) Stannous tetrafluoride, ${\mathbf{SnF}}_4$;

(d) Hydrogen chloride acid, $\mathbf{HCI}$;

Step-by-Step Solution

Answer

(a) The corrected name is Calcium chloride.

(b) The corrected name is Copper(I) oxide.

(c) The corrected name is stannic fluoride.

(d) The corrected name is hydrochloric acid.

Step 1: To Correct the name for Calcium (II) dichloride,

The state of calcium does not need to be named because +2is its only possible state. It is also unnecessary to mention that the substance is dichloride.

Calcium chloride ${\mathbf{CaCI}}_{\mathbf{2}}$would be the correct Name.

Step 2: To Correct the name to match the formula for Copper (II) oxide,

$\mathrm{CuO}$ would be the formula if it were copper(II) oxide. It is copper(I) oxide because the formula is ${\mathrm{Cu}}_2\mathrm{O}$.

Copper(I) oxide would be the correct name.

Step 3: To Correct the name to match the formula for Stannous tetrafluoride,

The tin should have a charge of +4because fluoride has a charge of -1, and to balance these -4 charges tin would be in a +4 state.

+2 state of tin is named as stannous while +4 state is named as stannic. Moreover, because the molecule is an ionic compound, it does not require prefixes, therefore the tetra is dropped.

So, Stannic fluoride would be the correct name.

Step 4: To Correct the name to match the formula for Hydrogen chloride acid,

We can eliminate the prefix mono because there is only one hydrogen and it is the first element in a covalent bond.

We can combine the two names and alter the suffix- ide to -ic because the molecule is an acid.

Hydrochloric acid would be the correct name.