In a titration to determine the concentration of a potassium hydroxide solution, a student pipettes 25.0 cm³ of the alkali into a conical flask and adds a few drops of phenolphthalein indicator.
Dilute hydrochloric acid is slowly run in from a burette until the end point is reached.
State the colour change observed 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.