A student carries out a titration to determine the concentration of a sample of dilute sulfuric acid.
Using a pipette, 25.0 cm325.0\text{ cm}^325.0 cm3 of the dilute sulfuric acid is transferred into a conical flask, and a few drops of phenolphthalein indicator are added. Sodium hydroxide solution is then added slowly from a burette until the acid has just been neutralised.
State the colour change of the phenolphthalein indicator in the conical flask at the end point of this titration.
Practise Edexcel GCSE Chemistry Acids with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.