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Question 1 of 3
1. Question
Watch the following two videos and use them to answer the questions that follow
Sort elements
- loss
- gain
- Mg
- Ca
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Oxidation is the _________ of electrons
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Oxidation is the _________ of oxygen
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In the reaction 2Mg + O2 → 2MgO. ___ is oxidized?
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In the reaction 2Ca + O2 → 2CaO, ___ loses electrons?
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Question 2 of 3
2. Question
Watch the video (optional), then answer the questions that follow.
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Compared to the ‘big boys of organic chemistry’ (carbon, nitrogen, oxygen and sulfur), hydrogen is at holding on to electrons. [ good || bad ]
If losing hydrogen is the same thing as losing an electron, oxidation can therefore be defined as the of hydrogen [ loss || gain ]
In the reaction 2H2S + 2O2 → S + 2H2O , sulfur is [ oxidized || reduced ] because it [ gains || loses ] hydrogen.
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Question 3 of 3
3. Question
This video will give you a way to remember the meanings of ‘oxidation’, ‘reduction’, ‘oxidizing agent’ and ‘reducing agent’. Use it to answer the questions below.
Here is the summary of the information from the video:
Now, the questions:
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A way to remember oxidation is to think that when an element is oxidized, its electrons are stolen. It is therefore made to feel [ awkward || stupid ] , so it has been “awksidized”.
A way to remember reduction is to imagine that when an element is reduced, it is really ‘deuced’, so [ protons || electrons ] are thrown towards it. So we are thinking of an electron as a baseball.
A substance that is good at gaining electrons by stealing them from others is a good agent [ oxidizing || reducing ]. (Remember that when you steal electrons from other atoms you make them feel ‘awkward’.)
A substance that is good at donating electrons to others is a good agent [ oxidizing || reducing ] (Remember that when you donate, or ‘throw’, electrons to other atoms, you ‘deuce’ them.
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