Asked by Jessica
A certain amount of calcium reacts with water and the formed hydroxide 49g completely neutralized phosphoric acid. Calculate the volume of hydrogen obtained,
at STP, and the mass of calcium.
at STP, and the mass of calcium.
Answers
Answered by
DrBob222
Ca + 2H2O ==> Ca(OH)2 + H2
mols Ca(OH)2 = grams/molar mass = ?
Using the coefficients in the balanced equation, convert mols Ca(OH)2 to mols H2.
Then use PV = nRT OR 1 mol at STP is 22.4L to convert to volume.
For grams Ca, g = mols x molar mass.
mols Ca(OH)2 = grams/molar mass = ?
Using the coefficients in the balanced equation, convert mols Ca(OH)2 to mols H2.
Then use PV = nRT OR 1 mol at STP is 22.4L to convert to volume.
For grams Ca, g = mols x molar mass.
Answered by
Jessica
thank you so much DrBob222 ^^
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