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Chemistry
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b) What 3 factors can increase the rate of reaction? (3 Marks)

b) A catalysis, increased temperature, increased concentrationb

CP
Answered by Claire P. Chemistry tutor
2368 Views

a) Complete the balanced symbol equations: (2 marks) H2SO4 + NaOH  HCl + Mg(OH)2 

H2SO4 + 2NaOH --> 2H2O + Na2SO4
2HCl + Mg(OH)2 --> 2H2O + MgCl2

CP
Answered by Claire P. Chemistry tutor
3941 Views

A compound being analysed has the percentage composition by mass Ca = 13.9%, W = 63.9%, O = 22.2%. Calculate the empirical formula of this compound

Using rows to represent mathematical operations and a column for each compound we can draw ourselves a table:

                             Ca       W      O
%                         13.9    ...

HD
Answered by Haydn D. Chemistry tutor
5222 Views

Would you expect a calcium ion to be bigger, smaller or the same size as a calcium atom? Give TWO reasons to explain your answer.

Calcuim is in group two which means when it forms an ion it will donate its two outer elections, this means a calcium ion will be smaller as it has one less shell of electrons.  

UC
Answered by Urma C. Chemistry tutor
14480 Views

State and explain the effect of the following on the rate of a reaction: a) increasing temp b) increasing pressure c) increasing concentration of ONE reactant d) adding a catalyst. In each case state what will happen to the rate constant, k.

a)         will increase

            greater collision energy

            so greater chance of activation energy being exceeded

            so greater fraction of successful collision...

JP
Answered by Joseph P. Chemistry tutor
4262 Views

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