1. Aluminium combines with Hydrochloric acid to form Aluminium chloride and hydr
ID: 517061 • Letter: 1
Question
1. Aluminium combines with Hydrochloric acid to form Aluminium chloride and hydrogen. write a balanced equation and use 10.56g Aluminium to calculate the volume of hydrogen at STP that would be formed from this reaction.
2. elemental copper can be produced by a single replacement reaction between zinc metal and a solution of copper II Sulfate. write a balanced equation and determine how many atoms of zinc would be needed to produce a mass of copper equal to 30.71g Cu.
3. sodium chloride reacts with silver nitrate to produce a precipitate of silver chloride. write a balanced equation and and determine what mass of silver chloride would be produced if 103.84g of NaCl is used in the reaction.
Explanation / Answer
molar mass of Al = 27 g/mol
number of mol of Al = mass / molar mass
= 10.56 g / 27 g/mol
=0.391 mol
The balanced chemical reaction is:
2 AL + 6 HCl = 2 ALCl3 + 3 H2
Form above reaction,
mol of H2 produced = (3/2)*mol of Al reacted
=(3/2)*0.391 mol
= 0.587 mol
1 mol of any gas at STP has volume of 22.4 L
Volume = number of mol * 22.4 L
= 0.587 * 22.4 L
= 13.14 L
Answer: 13.14 L
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