This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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Here are the solutions to the questions from the image: 5. ii) Mass number The mass number refers to the total number of protons and neutrons in the nucleus of an atom. 6. The table below shows the pH of four solutions: | Solution | pH | | :------- | :--- | | P | 2.0 | | Q | 12.0 | | R | 7.0 | | S | 5.0 | 6. a) Identify the following: i) Strongly acidic solution A strongly acidic solution has a low pH value. P ii) Strongly basic solution A strongly basic solution has a high pH value. Q iii) Neutral solution A neutral solution has a pH of 7. R 6. b) State ONE use of acids and ONE use of bases in daily life. Use of acid: Hydrochloric acid* is present in the stomach to aid in the digestion of food. Use of base: Sodium hydroxide* (caustic soda) is used in the manufacture of soap and detergents. 7. a) Define isotopes. Isotopes are atoms of the same element that have the same number of protons (atomic number) but different numbers of neutrons, leading to different mass numbers. That's 2 down. 3 left today — send the next one.