Question

Write The Molecular And Structural Formula For Bahboric Acid , If we Have 500ml of Bahboric Acid ( 0.1 N ) Mixed With Crystic Acid ( 0.05 N ) Titrated With 10ml Of LHFK Salt ..
What Is The Concentration Of LHFK Salt ?
What IS The Best Indicator ?

Answer 1

The molecular formula for bahboric acid is C19 H20 O7. The structural formula for bahboric acid in attach.

The concentration of LHFK Salt is:

$$c(\text{acids}) * V(\text{acids}) = c(\text{salt}) * V(\text{salt})$$ $$c(\text{salt}) = (0.1 + 0.05) * 0.5 \, \text{L} / 0.01 \, \text{L} = 7.5 \, \text{N}$$

The most suitable indicator for the titration is Cresol red (pH range: 7.2-8.8).