In order to find the [H+] ion content of H2SO4 (Sulphuric Acid), why must you divide by two after using the formula for pH calculation?
This is because H2S04 is a diprotic acid. If we look at how the acid dissiociates, we can see that:
H2SO4----------> 2H++SO42-
Since there are two H+ ions dissociating, using the formula for pH would give the H+ ion content within the whole acid, i.e 2H+
Dividing it by two would equate to a singular H+, which is what the question asks.
JJ
Related Chemistry A Level answers
All answers ▸Draw an example using a diagram of Carbon, three "Y" substrates and an "L" indicating any leaving group the Sn1 nucleophilic substitution reaction. (3 marks) Which step is fastest (1 mark).
Describe how to test for and identify halide ions in a solution.
What is the meaning of the term 'structural isomers'?
The equilibrium N2O4 (g) -->--< 2NO2 (g) is set up when N2O4 dissociates. When 0.0370 moles of N2O4 dissociates at 25 degrees in a 0.5dm3 sealed container, 0.0310 moles of N2O4 remains at equilibrium. Calculate the value of Kc for this reaction.