A student adds water to a sample of concentrated nitric acid. Nitric acid is a strong acid.
Which statement describes the nitric acid after the water is added?
It is more concentrated and still strong.
It is more dilute and is now weak.
It has the same concentration and is now weak.
It is more dilute and still strong.
53 exam-style questions on OCR GCSE Chemistry 3.3 Types of chemical reactions, covering 3.3.1 Oxidation and reduction in terms of oxygen, 3.3.2 Acids, alkalis and neutralisation, 3.3.3 The pH scale and measuring pH, 3.3.4 Oxidation and reduction in terms of electrons, 3.3.5 Dilute and concentrated, weak and strong acids, and 3.3.6 Hydrogen ion concentration and pH. Each one has a worked solution and a mark scheme showing where the marks go.