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Chapter 19, 23

Revise Acids and Bases

QuestionAnswer
What taste do acids generally have? Sour.
Write the formula for hydrochloric acid and sulphuric acid Hydrochloric Acid: HCL Sulphuric Acid: H2SO4
What is the pH range for acids? From 0 to 7 with 0 being the strongest acid.
What is the pH range for bases? From 7 to 14 with 14 being the strongest base.
What is the pH of a neutral substance? 7.
What is an indicator? An indicator is something we use to show if a substance is an acid or base visually.
What colour does litmus paper turn in an acid? From blue to red.
What colour does litmus paper turn in a base? From red to blue.
What is the pH scale and how do you use it? The pH scale is used to show the strength of an acid or base. The lower the scale the more acidic something is, the higher the scale the more basic it is.
State the names and chemical formula for sulphuric acid, hydrochloric acid, Sodium hydroxide and calcium hydroxide Sulphuric acid: H2SO4 Hydrochloric acid: HCL Sodium hydroxide: NaOH Calcium hydroxide: Ca2
Identify the following compounds as acids or bases, H2SO4, HCL, NaOH, Ca2. H2SO4: Acid HCL: Acid NaOH: Base Ca2: Base
Describe what happens when an acid reacts with a base. They neutralise each other to form water and salt.
What is the reaction between an acid and a base called? Neutralisation.
What is produced when an acid is neutralised by a base? Water and a salt.
What is a titration? A titration is performed to work out the strengths of the acid or base used.
Created by: SC Dave