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What are the oxidation numbers of each element in these examples: a) H2SO4 b) N2 c) NH4+

a) H 2 SO 4 ANSWER: H: +1 S: +6 O: -2 b) N 2 ANSWER: N: 0 (all elements not within a compound have an oxidation number of 0 eg I 2 , O 2 , K) c) NH 4 + ANSWER: N: -3 H: +1 (sum of oxidation numbers within co...
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Answered by Georgia B. • Chemistry tutor
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What is equilibrium in regards to chemical reactions?

A + B -----> AB In the chemical reaction above, reactant A reacts with reactant B to form product AB. However, it is a common misconception that this reaction only goes in the forward direction (which is ...
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c) What does the rate of reaction depend on? (2 marks)

Collision frequency of reacting particles Energy transferred during the collision
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Answered by Claire P. • Chemistry tutor
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b) What 3 factors can increase the rate of reaction? (3 Marks)

b) A catalysis, increased temperature, increased concentrationb
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Answered by Claire P. • Chemistry tutor
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a) Complete the balanced symbol equations: (2 marks) H2SO4 + NaOH  HCl + Mg(OH)2 

H 2 SO 4 + 2NaOH --> 2H 2 O + Na 2 SO 4 2HCl + Mg(OH) 2 --> 2H 2 O + MgCl 2
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Answered by Claire P. • Chemistry tutor
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