Chapter 8, Problem 19A

Interpretation Introduction

Interpretation:

The number of units of Na+ and OH- produced when 1000 units of NaOH were dissolved in water needs to be determined.

Concept Introduction:

The substance which dissociated in water into charged particles i.e. ions is known as electrolytes.

Answer to Problem 19A

1000 units of Na+ ions and 1000 units of OH- ions will produce.

Explanation of Solution

Electrolytes are of two types:

Strong electrolytes

Weak electrolytes

The electrolytes which are completely ionized are known as strong electrolytes. Strong electrolytes have high electrical conductivity.

The ionized reaction of strong electrolyte is shown below:

  $\text{strong}\text{electrolyte}\left(\text{aq}\right)\text{}\text{}\to {\text{cation}}^{\text{+}}\left(\text{aq}\right)\text{}\text{+}{\text{anion}}^{\text{-}}\left(\text{aq}\right)$

The electrolytes which are partially ionized are known as weak electrolytes. Weak electrolytes have low electrical conductivity.

Sodium hydroxide is a strong electrolyte which conducts electricity. NaOH is an alkali water soluble strong base.

The reaction is shown below:

  $\text{NaOH}\left(\text{aq}\right)\to {\text{Na}}^{\text{+}}\text{+}{\text{OH}}^{\text{-}}$

When NaOH dissolved in water it dissociates into Na+ and OH- ions it means when 1000 units of NaOH dissolved in water then 1000 units of Na+ ions and 1000 units of OH- ions will produce.

Conclusion

Thus, 1000 units of Na+ ions and 1000 units of OH- ions will be produced.