Chapter 7, Problem 134A

Interpretation Introduction

Interpretation:

The four other compounds of sodium ion formed from sea water needs to be determined and their formula and name needs to be given.

Concept introduction:

In ionic compounds, there is a positive ion and negative ion combined together in fixed ratios. The cations are positively charge ions while anions are negatively charged ions.

Answer to Problem 134A

The four other compounds of sodium and their formula is given below:

1. Sodium fluoride- $\text{NaF}$

2. Sodium bromide- $\text{NaBr}$

3. Sodium sulfate- ${\text{Na}}_2{\text{SO}}_4$

4. Sodium carbonate- ${\text{Na}}_2{\text{CO}}_3$.

Explanation of Solution

Sodium cation easily combines with other anions like ${\text{F}}^{-},{\text{SO}}_4{}^{2-},{\text{CO}}_3{}^{2-},{\text{Br}}^{-}$ etc which are present in sea water. This results in the formation of $\text{NaF}$, $\text{NaBr}$, ${\text{Na}}_2{\text{SO}}_4$ and ${\text{Na}}_2{\text{CO}}_3$. The compounds are bind with oppositely charged particles so, are have strong electrostatic force.

Conclusion

In sea water, ${\text{Na}}^{\text{+}}$ the positive charged ion can form compounds with other anions present in the sea water by combining with them in fixed ratio.