Respuesta :
To neutralize 23.5 mL of a 0.145 M barium hydroxide solution, 23.9 mL of a 0.284 M hydrochloric acid solution is needed.
What does barium hydroxide serve?
Barium hydroxide is used to titrate weak acids, especially organic acids, in analytical chemistry. In contrast to the alkali hydroxides, barium carbonate creates clear, carbonate-free aqueous solutions because it is insoluble in water.
Acidity of barium hydroxide
When heated to 800 °C, barium hydroxide turns into barium oxide. Barium carbonate is produced when carbon dioxide reacts with it. Its strong base causes its extremely alkaline aqueous solution to go through neutralization reactions with acids.
Briefing:
The equation is given as:
Ba(OH)₂ + 2HCl ------> BaCl₂ + 2H₂O
from the equation it is clear that :
1mole of Ba(OH)₂ = 1 mole of HCl
number of moles of Ba(OH)₂ = volume × Molarity
= 0.0235 × 0.145
= 0.0034 mol
Therefore, number of moles of HCl = 2× 0.0034 mol = 0.0068 mol
volue of HCl = moles / Molarity
= 0.0068 / 0.284
= 0.0239 L = 23.9 mL
Thus, The volume of a 0.284 M hydrochloric acid solution is required to neutralize 23.5 mL of a 0.145 M barium hydroxide solution is 23.9 mL.
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