7. During electrolysis of water, why the gas collected in one test tube is double the amount collected in other? How can we identify the gas present in each test tube?
Answers
Answer:
=> This is because the formula of water is H2O, so the volume of hydrogen produced is twice the volume of oxygen produced.
=> the gas with more bubbles is hydrogen and the gas with less bubbles is oxygen....it is beacause of the fact that the ratio of hydrogen and oxygen is 2:1(atomic ratio and not mass ratio).....as a result the hydrogen gas produced will be double than that of oxygen
Answer:
the gases collected by the electrolysis of water are : hydrogen and oxygen. The amount of hydrogen seems double the amount of oxygen because in one molecule of water,there are 2 atoms of hydrogen and 1 atom of oxygen and therefore the volume of hydrogen is double the volume of oxygen,i.e ,ratio of volume of hydrogen and oxygen thus collected by electrolysis of water are 2:1.
We can identify hydrogen as:
(1) ordinary hydrogen burn in air with a pop sound ,
(2)pure hydrogen burns in air or oxygen with a pale blue flame .
Oxygen can be identified as:
(1)when be bring a glowing splinter near the oxygen,the splinter will rekindle because oxygen supports combustion.