A student starts with a beaker containing 50 cm3 of 0.1 mol dm-3 ammonia solution. They gradually add an excess of 0.1 mol dm-3 nitric acid while monitoring the pH with a calibrated pH probe.
Which of the following represents the most likely change in pH during this experiment?
from 111 to 111111
from 111111 to 111
from 111111 to 777
from 141414 to 111
276 exam-style questions on Edexcel GCSE Chemistry 4.1 Acids, covering 4.1.1 Acids, alkalis and the pH scale, 4.1.2 Hydrogen ion concentration and pH, 4.1.3 Dilute and concentrated, weak and strong acids, 4.1.4 Bases, alkalis and the reactions of acids, 4.1.5 Chemical tests for hydrogen and carbon dioxide, 4.1.6 Neutralisation as a reaction of acids with bases, 4.1.7 Preparing soluble salts, and 4.1.8 Solubility rules and preparing insoluble salts. Each one has a worked solution and a mark scheme showing where the marks go.