Presentation on theme: "Andy Zhu Bryan Law Jason Ding Liam Jordan. How does the temperature of anode and cathode solutions ZnNO 3 and CuNO 3 affect the voltage in a voltaic."— Presentation transcript:
Andy Zhu Bryan Law Jason Ding Liam Jordan
How does the temperature of anode and cathode solutions ZnNO 3 and CuNO 3 affect the voltage in a voltaic cell? Hypothesis: Increased temperature would lead to an increased amount of voltage
Zn (s) Zn 2+ (aq) + 2e - (.76V) [oxidation] Cu 2+ (aq) + 2e - Cu (s) (.34V) [reduction] Zn (s) + Cu 2+ (aq) Zn 2+ (aq) + Cu (s) (1.1V)
VariablesMethods Independent Temperature of the anode and cathode solutions Temperature was controlled at increments of 5, 10, 25, 40, 55, and 65 C o. Measured by thermometers Dependent Amount of voltage produced Measured between the anode and cathode by a volt-meter. Controlled 1. Type of anode/cathode solution 2. Volume 3. Beaker 4. Type of salt bridge 5. Type of copper and zinc 6. Voltmeter 1.The anode and cathode solutions were taken from the same 0.5 molar flasks. 2.Volume of the anode and cathode solutions were measured at 25ml 3.The same 100ml beaker was used 4.Salt-bridge was KCl filter paper 5.The same zinc and copper plates were used. 6.Same voltmeter was used.
Temperat ure (°C) ± 0.3°C Trial 1 (Voltage) ±.005V Trial 2 (Voltage ) ±.005V Trial 3 (Voltage) ±.005V Mean (Voltage) ±.015V Standard Deviation Change in Temperature of.5MZnNO3 and.5MCuNO3 vs. Voltage Output
In the end our hypothesis was supported by the data we received. An increase in temperature resulted in higher voltage. Errors/Improvements Nature of correlation inconclusive
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