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These kinds of questions often come up in GCSE papers and involve algebraic manipulation. The key to answering these questions is finding a common factor in the numerator and denominator that can be cance...

Buffer solution is a system that minimises the change in pH when a small amount of acid or base is added. There are two types of buffer solutions- alkaline buffer solution and acidic buffer solution. The ...

First, look at the Periodic Table. Potassium is in group 1 so has a +1 charge, Li⁺Sulphates always have a -2 charge, SO4 ^2-Now combine two ions together so we can ge...

Rate of reaction is a change in concentration of a reactant or product, per unit time, measured in dm³s-1. You can calculate the rate of reaction from the graph- plot the graph of concantration...

To answer this question, we must use our knowledge of integration and differentiation. 
First, we look at the information given to us. We have been told that the gradient of the curve is given by dy/...