Aluminum hydroxide reacts with phosphoric acid to give AlPO4. The substance is usedindustrially in adhesives, binders, and cements.(a) Write the balanced equation for the preparation of AlPO4from aluminumhydroxide and phosphoric acid.(b) If you begin with 152 g of aluminum hydroxide and 3.00 L of 0.750 Mphosphoric acid, what is the theoretical yield of AlPO4?(c) If you place 25.0 g of AlPO4in 1.00 L of water, what are the concentrations ofAl3+ and PO43− at equilibrium? (Neglect hydrolysis of aqueous Al3+ and PO43−ions.) Kspfor AlPO4is 1.3 × l0−20.(d) Does the solubility of AlPO4increase or decrease on adding HCl? Explain.

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Aluminum hydroxide reacts with phosphoric acid to give AlPO4
. The substance is used
industrially in adhesives, binders, and cements.
(a) Write the balanced equation for the preparation of AlPO4
from aluminum
hydroxide and phosphoric acid.
(b) If you begin with 152 g of aluminum hydroxide and 3.00 L of 0.750 M
phosphoric acid, what is the theoretical yield of AlPO4?
(c) If you place 25.0 g of AlPO4
in 1.00 L of water, what are the concentrations of
Al
3+ and PO4
3− at equilibrium? (Neglect hydrolysis of aqueous Al
3+ and PO4
3−
ions.) Ksp
for AlPO4
is 1.3 × l0
−20
.
(d) Does the solubility of AlPO4
increase or decrease on adding HCl? Explain.

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