502 Incorrect. Are there the same number of atoms on each side of the equation?

Question

502 Incorrect. Are there the same number of atoms on each side of the equation? (b1) Chromium (gives Cr+) Balanced molecular equation 5.031 5043 n5011 n 5.014 2Cr(s) + 3H,so,(aq) _ Cr2(SO4)3(aq) + 3H2(g) Incorrect. All ions should still be included even spectator ions. (b2) Chromium (gives Cr3+) Balanced ionic equation: em 5.096 3+ 2- Edit em5.092Crs)+2H by Study Incorrect. There should be no spectator ions remaining in the equation. nt i Privacy Policy I 2000-201,Johnwiley&Sons;,Inc. All Rights Reserved. A Division of 20hnwileyasonsine

Explanation / Answer

Balanced equation:
2 Cr(s) + 3 H2SO4(aq) ===> Cr2(SO4)3(s) + 3 H2(g)
Reaction type: single replacement
Balanced Ionic AND net ionic:

2 Cr(s) + 6 H+(aq) + 3 SO42-(aq) ==> Cr2(SO4)3(s) + 3 H2(g)

IF the chromium sulfate remains in solution then the Ionic equation becomes:

2 Cr(s) + 6 H+(aq) + 3 SO42-(aq) --> 2 Cr3+(aq) + 3 SO42-(aq) + 3 H2(g)

Cancel the spectator ions to give net ionic equation

2 Cr(s) + 6 H+(aq) ===> 2 Cr3+(aq) + 3 H2(g)

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