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A buffer was made by mixing 20cm3 of 0.05M NaOH and 20cm3 of 0.25M propanoic acid. Calculate the pH. Ka=1.34x10^-5

pH is calculated using the equation pH=-log[H+]. The concentration of H+ ions, therefore, needs to be calculated. The amount of each substance can be calculated by multiplying the concentration by the volume...
MC
Answered by Michael C. • Chemistry tutor
14024 Views

Why is phenylamine a weaker base than ethylamine?

Phenylamine is a weaker base than ethylamine because the lone pair on the nitrogen atom in phenylamine is spread into the delocalised electron ring in benzene, therefore is less available for protonation tha...
AJ
Answered by Adam J. • Chemistry tutor
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In transition metals, where does the formation of colour come from?

The answer for this stems from the very definition of what a transition metal is: a metal that can form one or more stable ions with partially filled d-subshell. The partially fill d-subshell part is crucial...
CW
Answered by Charles W. • Chemistry tutor
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How do i tell if a substance has been Oxidised or Reduced?

We know from GCSE that Gaining of electrons is reduction; and Loss of electrons is oxidation. This can be remembered by the pneumonic: 'OIL RIG' :Oxidation Is Loss Reduction Is Gain. At A-level it can be con...
DK
Answered by Dominic K. • Chemistry tutor
10816 Views

How does the oxidising power of the group 1 metals vary?

The group one metals all have one electron in their outer shell, so are "electron donors". The further down the group one goes, the higher the electron shell containing the lone electron. The resul...
AK
Answered by Adithya K. • Chemistry tutor
3678 Views