1. Making Galvanic Cells Lab 3)The salt bridge allows the cell to continue to function. K + or NO 3 – can move into one of the half cells to balance the charge created by + metal ions forming or leaving solution. 4)No. We did not get the same values in the lab No bridgeVoltagePoints toDeposit Cu – Al 0 V2.0 VCu Cu – Zn 0 V1.1 VCu Al – Zn 0 V0.9 VZn

2. Cu – Zn cell Zn Zn 2+ + 2e – (oxidation - LEO) Cu 2+ + 2e – Cu (reduction - GER) Cu 2+ + Zn Cu + Zn 2+ Electron flow Salt bridgeCu (+) Zn (–) Cu 2+ Zn 2+

3. Al – Zn cell Zn 2+ + 2e – Zn (reduction - GER) Al Al 3+ + 3e – (oxidation - LEO) 2Al + 3Zn 2+ 2Al 3+ + 3Zn Electron flow Salt bridgeZn (+) Al (–) Zn 2+ Al 3+

4. Making Galvanic Cells Lab AlDepositCuDeposit AlPoints toCuPoints to 0.5 30 sec 0.9 30 sec 0.5 0 sec 0.9 0 sec 0No bridge0 voltageAl-ZnvoltageCu-Zn 3)The salt bridge allows the cell to continue to function. K + or NO 3 – can move into one of the half cells to balance the charge created by + metal ions forming or leaving solution. 4)No. We did not get the same values in the lab For more lessons, visit www.chalkbored.com www.chalkbored.com