How many mole of glycerine should be added to 1 litre of 1 M `H_(3)BO_(3)` so that 80% of boric acid form boric acid-glycerine complex ?
`H_(3)BO_(3) +` Glycerine `rarr `Complex` Kc = 0.90`

Explanation

To solve the problem, we need to determine how many moles of glycerine should be added to 1 liter of 1 M \( H_3BO_3 \) (boric acid) so that 80% of the boric acid forms a complex with glycerine.

### Step-by-Step Solution:

1. **Determine Initial Moles of Boric Acid:**
- Given that the concentration of \( H_3BO_3 \) is 1 M and the volume is 1 L, the initial moles of boric acid are:
\[
\text{Initial moles of } H_3BO_3 = 1 \, \text{M} \times 1 \, \text{L} = 1 \, \text{mole}
...