Question

Give below, are some formulae. Write down the chemical name of each
(A) \[{\text{Ca}}{{\text{C}}_{\text{2}}}\]
(B) \[{\text{Ca}}{{\text{H}}_{\text{2}}}\]
(C) \[{\text{AlN}}\]
(D) \[{{\text{K}}_{\text{3}}}{\text{P}}{{\text{O}}_{\text{3}}}\]

Answer 1

Hint: In the chemical formula, identify the first component and the second component. Write the name of the element present in the first component. Then write the name of the element present in the second component, and add the suffix ‘-ide’. Use numerical prefixes to indicate the number of atoms in a molecule.

Complete Step by step answer: The chemical formula \[{\text{Ca}}{{\text{C}}_{\text{2}}}\] represents the chemical compound calcium carbide.
The first component is \[{\text{Ca}}\] . It represents the element calcium. The second component is \[{\text{C}}\] . It represents the element carbon. Add the suffix ‘-ide’. The name of the second component becomes carbide. The number 2 indicates that in one molecule of calcium carbide, two carbon atoms are present. However, in this example, it is not necessary to add a numerical prefix.
The chemical formula \[{\text{Ca}}{{\text{H}}_{\text{2}}}\] represents the chemical compound calcium hydride. The first component is \[{\text{Ca}}\] . It represents the element calcium. The second component is \[{\text{H}}\] . It represents the element hydrogen. Add the suffix ‘-ide’. The name of the second component becomes hydride. The number 2 indicates that in one molecule of calcium hydride, two hydrogen atoms are present. However, in this example, it is not necessary to add a numerical prefix.

The chemical formula \[{\text{AlN}}\] represents the chemical compound aluminium nitride. The first component is \[{\text{Al}}\] . It represents the element aluminium. The second component is \[{\text{N}}\] . It represents the element nitrogen. Add the suffix ‘-ide’. The name of the second component becomes nitride.
The chemical formula \[{{\text{K}}_{\text{3}}}{\text{P}}{{\text{O}}_{\text{3}}}\] represents the chemical compound potassium phosphite. The first component is \[{\text{K}}\] . It represents the element potassium. The second component is \[{\text{P}}{{\text{O}}_3}\] . It represents the phosphite ion \[{\text{PO}}_3^{3 - }\] . The number 3 indicates that in one molecule of potassium phosphite, three potassium atoms are present. However, in this example, it is not necessary to add a numerical prefix.

Note: From the chemical formula, you can obtain the number of atoms of each type of element present in the given molecule. The number of atoms of different elements depends on the valence of these elements.