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Moles Q: finding the percentage barium in the sample...

For Q9a) I have this

Ba + 2H2O --> Ba(OH)2 + H2

For Q9b) I'm unsure as to which information given to use? Do I find the n using Ba and compare it to H2 since its a 1:1 ratio?

Reply 1

Ben :)

Original post by tessa.lin

For Q9a) I have this

Ba + 2H2O --> Ba(OH)2 + H2

For Q9b) I'm unsure as to which information given to use? Do I find the n using Ba and compare it to H2 since its a 1:1 ratio?

Find moles of H2 from the conversion bit in brackets, then use the 1:1 ratio to get moles of Ba, use the mr and moles to calculated mass of Ba then use (actual mass / calculated mass) x 100 to get the percentage! I think that should work ☺️