1 answer

Consider if 2.00g of alum were dissolved in water at a neutral pH and then reacted...

Question:

Consider if 2.00g of alum were dissolved in water at a neutral pH and then reacted with a slight excess of sodium hydroxide as such:

Al3+ (aq) + 3OH- (aq) ---> Al(OH)3 (s)

What mass of aluminium hydroxide is formed?


Answers

Alum has 1 mole of Alum gines amous of A1+3 - a formule of K, S&.ALLS97 2440 To The dissociation of Alum is given by. K SO. A1 mole of alum gives 2 moles of Al3+ ion,hence first calculate the moles of alum present in 2 gram then accordingly find the moles of al3+ produced.

1 mole Al3+ gives one mole of Al(OH)3 then accordingly calculate the mass of Aluminium hydroxide using its molar mass.

.

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