When the gas hydrogen bromide, HBr\text{HBr}HBr, is dissolved in water, a solution forms.
Blue litmus paper dipped in this solution turns red.
State why the litmus paper turns red.
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.