Show all work for ***** rating Aqueous potassium chloride (KCl) reacts with aque
ID: 698086 • Letter: S
Question
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Aqueous potassium chloride (KCl) reacts with aqueous chloroplatinic acid (H2PtCl6)to form insoluble potassium chloroplatinate (K2PtCl6) and aqueous Sodium Hydroxide (NaOH).
1) Write a balanced chemical equation for the above transformation.
2) Calculate the molar masses of each of the substances in your equation from part (a).
3) Calculate how many grams of potassium chloroplatinate are formed from complete reaction of a 0.50 mol sample of potassium chloride.
4) Calculate how many grams of potassium chloroplatinate are formed from complete reaction of a 0.50g sample of potassium chloride
Explanation / Answer
(1)
2 KCl (aq.) + H2PtCl6 ---------> K2PtCl6 + 2 HCl (aq.)
(2)
Fromt the balanced equation,
2 mol of KCl forms 1 mol of potassium chloroplatinate
(OR)
149 g. of KCl forms 486.0 g. of potassium chloroplatinate
(3)
From the balanced equation,
2 mol of KCl forms 486.0 g. of potassium chloroplatinate
then, 0.50 mol of KCl forms 0.50 * 486.0 / 2 = 121.5 g. of potassium chloroplatinate
(4)
From the balanced equation,
149 g. of KCl forms 486.0 g. of potassium chloroplatinate
then,
0.50 g. of KCl forms 0.50 * 486.0 / 149. = 1.63 g. of potassium chloroplatinate