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This question may seem difficult but we just have to remember the rules of parametric differentiation and the chain rule. The chain rules states that dy/dx=dy/dz*dz/dx where z is a third variable. Parametric...

When it comes to answering questions about inequalities, it is important to remember the signs and what they represent. In this instance, we need to find a range of solutions where 2(3x+1) is greater than 3-...

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 cancelle...

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 pH ...

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 get a neutral compound. We have +1 charge...