Neutralisation Flashcards
What is the definition of neutralisation?
When an acid reacts to an alkali to produce a neutral solution of a salt and water - acid + alkali —> salt + water
When we use the following acids name the salt that is formed.
Hydrochloric acid -
Sulphuric acid -
Nitric acid -
Chloride
Sulphate
Nitrate
Are the following a base or an alkali? Sodium hydroxide - Calcium oxide - Magnesium hydroxide - Lithium oxide - Copper oxide -
Base Alkali Base Base Base
Plants grow best at…
Chemicals like… added to neutralise ph
Ph7
Lime
Indigestion - hydrochloric acid in our stomach - too much acid.
Use a… to neutralise.
Base (indigestion tablet)
Insect stings - bee sting is… - neutralise with…
Acidic
Alkali eg. Baking soda
Wasp sting is… - neutralise with…
Alkaline
Acid eg. Vinegar
Acid + metal = ______
Acid + alkali = ______
Acid + base = ______
Acid + metal carbonate = ______
Salt + hydrogen
Salt + water
Salt + water
Salt + water + carbon dioxide
Potassium + sulfuric acid =
Potassium sulphate + water
Hydrochloric acid + sodium oxide =
Sodium chloride + water
Copper carbonate + sulfuric acid =
Copper sulphate + water + carbon dioxide
Zinc + nitric acid =
Zinc nitrate + hydrogen
Copper oxide + sulfuric acid =
Copper sulphate + salt + water
What colour does red litmus paper turn in…
Hydrochloric acid
Water
Sodium hydroxide
Red
Red
Blue
What colour does blue litmus paper turn in…
Hydrochloric acid
Water
Sodium hydroxide
Red
Blue
Blue
What colour does universal indicator solution turn in..
Hydrochloric acid
Water
Sodium hydroxide
Red
Green
Purple
What colour does method orange turn when out in…
Hydrochloric acid
Water
Sodium hydroxide
Red
Orange
Yellow-orange
What colour does screened methyl orange turn in…
Hydrochloric acid
Water
Sodium hydroxide
Orange-red
Green
Green
What colour does phenolphthalein turn when out in…
Hydrochloric acid
Water
Sodium hydroxide
Colourless
Colourless
Pink
Look at pg six of booklet
…
Hydrochloride acid + potassium hydroxide =
Potassium chloride + acid
Sulfuric acid + potassium hydroxide =
Potassium sulphate + acid
Hydrochloric acid + calcium carbonate =
Calcium chloride + acid
Hydrochloric acid + zinc =
Zinc chloride + hydrogen
What’s the is general equation for the reaction between an acid and a metal
Acid + metal = salt + water
How is indigestion caused?
Caused by stomach acid coming into contact with the sensitive, protective lining of the digestive system
What salt is used when magnesium oxide is used to neutralise stomach acid?
Chloride salt
What type of chemical is copper oxide?
Base
Sulfuric acid + copper oxide =
Copper sulfate + water
