Top answers

Chemistry
All levels

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
2395 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
3967 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
5253 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
14535 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
4292 Views

We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning