GCSE Chemistry Fuel cells

Last updated 11 months ago

13 questions

One mole of oxygen gas produces ______ mole of electrons but one mole of hydrogen produces ______ moles of electrons.
The electrons need to balance so twice as many moles of _____________are required. 

Other Answer Choices:

hydrogen

GCSE Chemistry Fuel cells

Last updated 11 months ago

13 questions

Trim End | 07:27

Question 1 | 00:15

Question 2 | 00:28

Question 3 | 01:25

Questions 4 & 5 | 01:33

Question 6 | 01:43

Question 7 | 02:41

Question 8 | 03:08

Question 9 | 04:20

Question 10 | 07:09

00:00/00:00

Question 1

00:15

Question 2

00:28

Question 3

01:25

Questions 4 & 5

01:33

Question 6

01:43

Question 7

02:41

Question 8

03:08

Question 9

04:20

Question 10

07:09

Beth works for a company that makes hydrogen fuel cells. She measures the potential difference of the cell shown. Before she sets up the cell, Beth tests each gas to check its identity. Describe the tests and the results for hydrogen and oxygen gas.
Test for hydrogen ________splint.
Result for hydrogen test _________________ 
Test for oxygen ____________  splint.
Result for oxygen test ____________________ 

Other Answer Choices:

lit

glowing

splint relights

squeaky pop.

One mole of oxygen gas produces ______ mole of electrons but one mole of hydrogen produces ______ moles of electrons.
The electrons need to balance so twice as many moles of _____________are required. 

Other Answer Choices:

hydrogen

A fuel cell filled with potassium hydroxide solution works better than one filled with pure water. One reason is that potassium hydroxide solution is a better electrical conductor than pure water. Explain why potassium hydroxide solution is a better electrical conductor than pure water.

Water decomposes to produce H+ and OH- at very low concentrations so in pure water there is a low concentration of elctrolysts and therfore pure water is a poor ______________  of electricity. 
Potassium hydroxide is very soluble so the concentration of the ________________  is higher and the solution is a better conductor..

Other Answer Choices:

conductor

electrolyte

GCSE Chemistry Fuel cells

GCSE Chemistry Fuel cells

What are the reactants in a hydrogen fuel cell

What are the reactants in a hydrogen fuel cell