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Topic 11: Redox and electrochemistry

26. Redox reaction: Determining the most easily reduced and oxidized substances

1. According to Reference Table J, which of these ions is most easily reduced? +
2+
+
3+
1) Ca 2) Cr 3) Cu 4) Ag

2 . Based on Reference Table J, which ion is most easily reduced? 2+ 2+
2+
2+
1) Sr 2) Mg 3) Ca 4) Ba

3. According to Table J, which ion is most easily oxidized?
1) Br- 2) Cl- 3) F- 4) I-

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4. Based on Reference Table J, which metal is most easily oxidized?
1) Ni 2) Zn 3) Cr 4) Co

2+
5. Which metal will reduced Zn to Zn ?
1) Mn 2) Cr 3) H2 4) Ag

27. Spontaneous redox: Determining reactions that are spontaneous
1. Based on Reference Table J, which reaction will take place spontaneously?
1) Ni + Pb(s) ------- > Ni(s) + Pb
2+
2+
3+
3+
2) Au + Al(s) -------- > Au(s) + Al
2+
2+
3) Sr + Sn(s) -------- > Sr(s) + Sn
2+
2+
4) Fe + Cu(s) --- ---- > Fe(s) + Cu

2. According to information from Reference Table J, which redox reaction occurs spontaneously?
2+
+
1) Cu(s) + 2H --------- > Cu + H2(g)
2+
+
2) Mg(s) + 2H --------- > Mg + H2(g)
+
+
3) 2Ag(s) + 2H ----------> 2Ag + H2(g)
+
+
4) 2Au(s) + 2H ---------- > 2Au + H2(g)

3. Based on Reference Table J, which redox reaction will occur spontaneously?
1) Br2 + KI ---------- > KBr + I2
2) I2 + KCl ---------- > KI + Cl2
3) Cl2 + KF --------- > KCl + F2
4) I2 + KBr -------- > KI + Br2
4. Referring to the Activity Series on Reference Table J, which reaction will not occur spontaneously
under standard conditions?
1) Sn(s) + 2HF ----------- > SnF2 + H2(g)
2) Mg(s) + 2HF ----------- > MgF2 + H2(g)
3) Ba(s) + 2HF ----------- > BaF2 + H2(g)
4) 2Cu (s) + 2HF ----------- > CuF2 + H2(g)

5. Which metal, according to Reference Table J, will react spontaneously with Al3+?
1) Co(s) 2) Cr(s) 3) Cu(s) 4) Ca(s)
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