Your Problem (10 points) (Each error -1 point) Activity Series 1. Predict the re

Question

Your Problem (10 points) (Each error -1 point) Activity Series 1. Predict the reaction (or N.R.) of manganese with chromium(Ill) chlorate (If reaction occurs, use the highest expected charge for manganese in the product.) Explain why the reaction occurs or why there is NR K Ba Na Explanation: Mg 2. Predict the reaction (or N.R.) of mercury with phosphoric acid. (If reaction occurs, use highestCr Fe expected charge for mercury in the product.)Explain why the reaction occurs or why there is NR. Ni Explanation: Pb Cu Hg Ag

Explanation / Answer

1) Mg2+ + Cr(ClO3)3 -----> Mg(ClO3)2 + Cr 3+

Explanation: The metals which are above the in the activity series are more reactive, so they displaces metals, which lying below them. The position of Mg is above in activity series than Cr, so Mg displaces Cr form Cr(ClO3)3 and reaction occurs. Mg (ClO3)2 is ionic compound. When it dissociate there is +2 charges on Mg.

2) H3PO4 + Hg ---> N R

Explanation: The metals lying below the hydrogen in the activity series cannot displace hydrogen from acids. The position of Hg in activity series is below the hydrogen, so it does not react with H3PO4. H3PO4 is a poor oxidizing agent, so there is no oxidation-reduction reaction.

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