1) A weak acid has a pH of between? a) 1-6 b) 3-6 c) 7 d) 7-14 e) 9-14 f) 9-16 2) A strong acid around pH1-2 has what colour in universal indicator? a) red b) orange c) yellow d) green e) blue f) purple 3) A weak alkali has a pH of around? a) 2 b) 3 c) 7 d) 8 e) 13 f) 14 4) A bee sting has a pH of about 5.0-5.5. Identify what the bee sting is. a) A strong acid b) A weak acid c) A neutral solution d) A weak alkali e) A strong alkali 5) Toothpaste has a pH of about 8-10. Identify what toothpaste is. a) A strong acid b) A weak acid c) A neutral solution d) A weak alkali e) A strong alkali 6) The colour of neutral in universal indicator is? a) red b) orange c) yellow d) green e) blue f) purple 7) Sodium hydroxide is an example of a strong alkali. What colour will sodium hydroxide turn universal indicator? a) red b) orange c) yellow d) green e) blue f) purple 8) A weak acid of around 4 has what colour in universal indicator? a) red b) orange c) yellow d) green e) blue f) purple 9) Water is neutral. What is the pH of water? a) 1 b) 5 c) 7 d) 9 e) 11 f) 13 10) A weak alkali of around 9-10 has what colour in universal indicator? a) red b) orange c) yellow d) green e) blue f) purple

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