Worksheet for Predicting Redox Reactions Metal and Halogen Activity Chart Li Li+

Question

Worksheet for Predicting Redox Reactions Metal and Halogen Activity Chart Li Li+ e- + Use the Activity Chart for Metals and Halogens on the next page to predict whether a reaction will occur and what the products are React with cold water Ba 2e to produ ce H2 1. Ca@ + 2H2O0) Ca(OH)2(aa) + H2(g] Na Na + e 2. Mg Mg" + 2e Hg(s) + H2O(l)-) Will not react. Zn Zn-+ 2e React with steam 3. Ni(s) + 2H20(v), Ni(OH)2(s) + H2(g) to produce H Fe Fe-+ 2e Cd Cd+ 2e Co Co-+ 2e Ni Ni+2e Sn Sn2 + 2e, 0(s) +2 . 5. Co(s) + 2HCl(ag) CoCl2(aa) + H2(g) +2 . React with acids to produce H2 7. Cus) + Br2(l) H. 2H + 2e Cu Cu + 2e 21 12 + 2e 8. Au(s) + 12(s) Will not react. 9. Ni12(ag) + F2(g) NiF2(aa) + 21(s) 10, Pt(s) + Br2(1) + e Do not react with water Hg Hg + 2e 2BrBr22e or acids to produce H2 Will not react. + 2e

Explanation / Answer

Q1.

correct, Calcium will form hydorxide + H2 gas

Q2

true, liquid/solid mercury has very low solubiliy/reactivit towards water

Q3

not likely to occur; Nickel will only react with acids,

Q4

once again, cobalt will only react with acids

Q5

True, cobalt will react with acid to form H2

Q6

False, silver will not react with acids,

Q7

According to potentials:

Cu2+ + 2 e Cu(s) +0.337;

Br2(l) + 2 e 2 Br +1.066

Cu(s) + Br2(l) --> Cu2+(aq) + 2Br-(aq)

Q8

no reaction, Au is stable

Q9

Ni2+ + 2 e Ni(s) 0.25

I2(s) + 2 e 2 I +0.54

F2(g) + 2 e 2 F +2.87

the most positive will reduce, so F2, forms F- ions

the most negative will oxidize, so Ni2+ remains

Therefore

2 I I2(s) + 2 e

F2(g) + 2 e 2 F

Ni2+(aq) + 2I-(aq) +F2(g) --> Ni+2(aq) + 2F-(aq) + I2(s)

note that nickel remains aqueous, iodine is formed solid via I2, not 2I

Q10

no reaction, Pt is very stable

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