Chapter 5, Problem 2ALQ

Interpretation Introduction

Interpretation:

To determine, the name of formulas; ${\text{CaCl}}_{\text{2}}$ and ${\text{CoCl}}_{\text{2}}$ also why they different.

Concept Introduction:

While naming a molecular compound, the first non-metal in the molecular formula is named first as its simple element name. After that the second non-metal is named using the first syllable of that non-metal name followed by ide suffix.

For example, the name for ${\text{BrF}}_{\text{5}}$ is bromine penta fluoride

Here, Br is first non-metal and F is the second non-metal and penta indicates the number of second non-metal.

The general rules for writing name of binary compound are as follows:

1. To write the positive ion first.
2. The write the name of negative ions after positive ion.
3. The positive ions always write as only the element’ name, there is no change required.
4. In the name of negative ion add−ide when write its name in the binary compound. Their number is indicated by prefixes, di-, tri-, tetra-, etc.