The working of a hydrogen–oxygen fuel cell is to be explained. Concept introduction: Oxidation is the addition of an electronegative element or the removal of an electropositive element in a chemical reaction . Reduction is the addition of an electropositive element or the removal of an electronegative element in a chemical reaction. Electrolysis is the process in which a reaction takes place at electrodes. The positively charged electrode is called anode. The negatively charged electrode is called cathode. During electrolysis, reduction takes place at the cathode and oxidation takes place at the anode. Fuel cells do not produce pollutants like carbon monoxide, sulfur dioxide, and nitrogen oxides.

Question

Lab Data The distance entered is out of the expected range. Check your calculations and conversion factors. Verify your distance. Will the gas cloud be closer to the cotton ball with HCI or NH3? Did you report your data to the correct number of significant figures? - X Experimental Set-up HCI-NH3 NH3-HCI Longer Tube Time elapsed (min) 5 (exact) 5 (exact) Distance between cotton balls (cm) 24.30 24.40 Distance to cloud (cm) 9.70 14.16 Distance traveled by HCI (cm) 9.70 9.80 Distance traveled by NH3 (cm) 14.60 14.50 Diffusion rate of HCI (cm/hr) 116 118 Diffusion rate of NH3 (cm/hr) 175.2 175.2 How to measure distance and calculate rate

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Chapter 14, Problem 17E

Interpretation Introduction

Interpretation:

The working of a hydrogen–oxygen fuel cell is to be explained.

Concept introduction:

Oxidation is the addition of an electronegative element or the removal of an electropositive element in a chemical reaction.

Reduction is the addition of an electropositive element or the removal of an electronegative element in a chemical reaction.

Electrolysis is the process in which a reaction takes place at electrodes. The positively charged electrode is called anode. The negatively charged electrode is called cathode. During electrolysis, reduction takes place at the cathode and oxidation takes place at the anode.

Fuel cells do not produce pollutants like carbon monoxide, sulfur dioxide, and nitrogen oxides.

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Lab Data The distance entered is out of the expected range. Check your calculations and conversion factors. Verify your distance. Will the gas cloud be closer to the cotton ball with HCI or NH3? Did you report your data to the correct number of significant figures? - X Experimental Set-up HCI-NH3 NH3-HCI Longer Tube Time elapsed (min) 5 (exact) 5 (exact) Distance between cotton balls (cm) 24.30 24.40 Distance to cloud (cm) 9.70 14.16 Distance traveled by HCI (cm) 9.70 9.80 Distance traveled by NH3 (cm) 14.60 14.50 Diffusion rate of HCI (cm/hr) 116 118 Diffusion rate of NH3 (cm/hr) 175.2 175.2 How to measure distance and calculate rate

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