Chapter 20, Problem 96A

Interpretation Introduction

Interpretation: The test tube that contains $\text{NaCl}$ by reacting with ${\text{BaSO}}_4$ and the test tube contains $\text{NaCl}$ is to be determined.

Concept introduction: The dissociation of ions in water is responsible for the chemical reaction between species.

Answer to Problem 96A

Test tube (a) contains $\text{NaCl}$ .

Explanation of Solution

  ${\text{BaSO}}_4$ is an insoluble substance in water. So, it will not dissociate in water as ${\text{Ba}}^{2+}$ and ${\text{SO}}_4{}^{2-}$ . Therefore the ions are not available to react with the ions of $\text{NaCl}$ . That is,

  ${\text{BaSO}}_4+\text{NaCl}\to \text{No}\text{reaction}$ .

  ${\text{BaSO}}_4$ , barium sulphate remains in its form upon dissolving in water. From the given images, in the test tube, there is no reaction is happening between $\text{NaCl}$ and also the added ${\text{BaSO}}_4$ is present at the bottom of the test tube. So (a) contains $\text{NaCl}$ .