What is the difference between an acid and a base?
An acid when dissolved in a liquid, will produce hydrogen ions (H+) while a base will produce hydroxide ions (OH-). When a litmus paper is used to test acids and bases, acids turn the litmus paper red while bases turn the litmus paper blue. On the pH scale (1-14), acids have pH less than 7 while bases have pH greater than seven.
LS
Related Chemistry A Level answers
All answers ▸Regarding the first ionisation energies, why do the values shown on the graph go down from magnesium to aluminium and then rise again from aluminium to silicon
Which of Na+ and Mg2+ is the smaller ion. Explain your answer. (2 marks)
Identify which 2 of the following processes involve an exothermic change: melting, boiling, freezing, deposition and sublimation
What is oxidation?