2,24x10^-2 dm3 of H2 was evolved (formed) when 24mg of bivalent metall X reacted with an acced of HCl.
correct answer: Mg how?
2007-05-30 02:58:43 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
X + 2HCl -> XCl2 + H2
2,24x10^-2 dm3 means 0.224 l
2007-05-30 05:24:07 · answer #1 · answered by ag_iitkgp 7 · 0⤊ 0⤋
The reaction:
X+2HCl ------> XCl2 +H2;
As 2.24x10^-2dm3 of H2 gas is evolved or 0.0224 liter of H2 gas,it means 0.0224/22.4 =1/1000 M of H2 is evolved;
or 1/1000 M of X must have reacted;
but the actual wt. of Metal X is 24 mg,it means 24 mg of X is equivalent to 1/1000M or Mol. wt of X is =24mgx1000=24 Gms .
Which is for Mg.
Hence, the correct answer is Mg.
2007-06-01 01:49:50 · answer #2 · answered by sb 7 · 0⤊ 0⤋
the 24mg of bivalent metall X was mgo
2007-05-30 12:16:25 · answer #3 · answered by Kevin George 1 · 0⤊ 0⤋
24mg of bivalent metall X was mgo
2007-05-31 16:30:41 · answer #4 · answered by vijay p 2 · 0⤊ 0⤋