Question

Calculate the number of equivalents in each of the following:

a.$1\text{mole of}{\mathrm{K}}^{+}$

b.${\text{2molesofOH}}^{-}$

c.$1{\text{mole ofCa}}^{2+}$

d.${{\text{3molesofCO}}_3}^{2-}$

Short answer

(part a) The number of equivalents in$1\text{mole of}{\mathrm{K}}^{+}=1eq$

(part b) The number of equivalent in${\text{2molesofOH}}^{-}\text{=2eq}$

(part c) The number of equivalent in$1{\text{mole ofCa}}^{2+}\text{=2eq}$

(part d) The number of equivalent in${{\text{3molesofCO}}_3}^{2-}=6eq$

Step-by-step solution

Introduction (part a).

The number of equivalents seems to be the amount of electrons or ions which can be transmitted in a chemical reaction.

Given Information (part a). 

$1\text{mole of}{\mathrm{K}}^{+}$

Explanation (part a).

Every mole has one equivalent for an ion with a charge of $+.$

Hence, $1\text{mole of}{\mathrm{K}}^{+}=1\mathrm{eq}$

Given Information (part b). 

${\text{2molesofOH}}^{-}$

Explanation (part b).

Each mole has one equivalent for just an ion with a charge of $-.$

Hence, ${\text{2molesofOH}}^{-}\text{=2eq}$

Given Information (part c).

$1{\text{mole ofCa}}^{2+}$

Explanation (part c).

Each mole has two equivalents for something like an ion with a charge of$2+.$

Therefore, $1{\text{mole ofCa}}^{2+}\text{=2eq}$

Given Information (part d).

${{\text{3molesofCO}}_3}^{2-}$

Explanation (part d).

Each mole has two equivalents for such an atom with a charge of$2^{-}.$

Hence, ${{\text{3molesofCO}}_3}^{2-}=6eq$