Chemistry, 03.08.2019 23:30 laureleiolson

Astudent performs a titration analysis for the following balanced reaction: 3 h2so4 + 2 al(oh)3 → al2(so4)3 + 6 h2o if a 200.0g sample of al(oh)3 is used to react with excess h2so4, how many grams of aluminum sulfate are produced? a 157g b 630g c 1750g d 438g

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The correct answer is 438g according to the following workings.

mole ratio of Aluminium hydroxide to aluminium sulphate= 2:1
number of moles in 200g of aluminium hydroxide = 200÷78
=2.564 moles
number of moles of Al2(SO4) produced by 200g of Al(OH)3=1.282
mass of Al2(SO4) produced = 342×1.282
= 438g

Answer from: rockinrachel9099

D. 438g
Looking at the balanced reaction, for every 2 moles of Al(OH)3 consumed, 1 mole of Al2(SO4)3 is produced. So let's start by calculating the molar mass of the reactant and product.
Atomic weight aluminum = 26.981539
Atomic weight sulfur = 32.065
Atomic weight oxygen = 15.999
Atomic weight hydrogen = 1.00794

Molar mass Al(OH)3 = 26.981539 + (15.999 + 1.00794)*3 = 78.002359 g/mol
Molar mass Al2(SO4)3 = 26.981539 * 2 + (32.065 + 15.999*4)*3 = 342.146078 g/mol

Moles Al(OH)3 = 200.0 g / 78.002359 g/mol = 2.564025019 mol
Moles Al2(SO4)3 = 2.564025019 mol / 2 = 1.282012509 mol

Grams Al2(SO4)3 = 1.282012509 mol * 342.146078 g/mol = 438.635552 g
And the closest answer is "D. 438g"

Answer from: Quest

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

Answer from: Quest

7is b8 is d9 is c10 is a11 is d

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Astudent performs a titration analysis for the following balanced reaction: 3 h2so4 + 2 al(oh)3 → a...

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