Your can dissolve an aluminum soft drink can in an(aq) base such as potassium hydroxide. 2Al(s)+2KOH(aq)+6H_2O\to2KAl(OH)_4(aq)+3H_2(g) If you place 2.05 g of alumimum in a beaker with 185 mL of 1.35 M KOH, will any aluminum remain(show all calculations). What mass of KAl(OH)_4 is produced?

Ernstfalld

Ernstfalld

Answered question

2021-03-26

Your can dissolve an aluminum soft drink can in an(aq) base such as potassium hydroxide.
2Al(s)+2KOH(aq)+6H2O2KAl(OH)4(aq)+3H2(g)
If you place 2.05 g of alumimum in a beaker with 185 mL of 1.35 M KOH, will any aluminum remain(show all calculations). What mass of KAl(OH)4 is produced?

Answer & Explanation

Aubree Mcintyre

Aubree Mcintyre

Skilled2021-03-28Added 73 answers

mole Al=(2.05g)(1mole26.98g)=7.60×102 mole Al
mole KOH = (0.185 L)(1.35 mole/L) = 0.250 mole KOH
According to the equation, for every mole of KOH you need one moleof Al. Al is therefore the limiting reactant and no aluminum will remain after the reaction.
As Al is the limiting reactant, calculate KAl(OH)4 as follows:
mole KAl(OH)4=(7.60×102 mole Al)(2 mole KAl(OH)42 mole Al)=7.60×102mole KAl(OH)4
mass KAl(OH)4=(7.60×102)(134.07gmole)=10.2gKAl(OH)4

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