A student investigated the reactivity of four different metals, P, Q, R and S.
Each metal was added to a separate test tube containing the same volume and concentration of dilute hydrochloric acid. The pieces of metal were all of the same size and shape.
The student recorded observations over a five-minute period.
The observations are shown in the table below.
| Metal | Observations with dilute hydrochloric acid |
|---|---|
| P | No bubbles observed. The metal looks completely unchanged after five minutes. |
| Q | Bubbles formed extremely rapidly. The metal dissolved completely within one minute. |
| R | Bubbles formed slowly. Most of the metal was still visible after five minutes. |
| S | Bubbles formed fast. The metal had completely dissolved after four minutes. |
Use the information in the table to place the metals in order of reactivity, from the least reactive to the most reactive.
Practise Edexcel GCSE Chemistry Obtaining and using metals 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.