Neutralisation Test Flashcards
What is neutralisation reaction
“A neutralisation reaction is where an acid reacts with an alkali to produce a neutral solution of a salt and water. Acid plus alkali equals salt plus water
What are alkalis
“Alkalis are soluble metal hydroxides e.g. sodium hydroxide, calcium hydroxide and potassium hydroxide”
Hydrochloric acid will make
Chloride
Nitric acid will make
Nitrate
Sulfuric acid will make
Sulfate
What are bases
“Bases are substances that react with acids and neutralise them.”
Acid+base equals
Salt+water
What is the difference between copper oxide and sodium hydroxide
They are both bases and will react with acids to neutralise the, but copper oxide is not and alkali because it does not dissolve water whereas sodium hydroxide does
Why are bases often used as household cleaners
They react with oils and fats
Give examples of things that contain sodium hydroxide
Drain cleaners and oven cleaners
What are weak bases and alkalis found in
“toothpaste, antacid tablets (to help cure an upset stomach) and baking powder.
”
What is the test for hydrogen gas
Place a splint in the gas and hydrogen will burn with a pop
Titration apparatus
Clamp stand, burette and titration stand
What is the test for carbon dioxide
Bubble the gas through limewater and it should go from colourless to cloudy
What is an indicator
Is a chemical that gives a colour change in acidic, alkaline and neutral solutions.
What colour is litmus paper in acid
Red
What colour is litmus paper in alkali
Blue
What does universal indicator do
“show us exactly how strongly acidic or alkaline a solution is.”
What is indigestion
“Indigestion, also known as dyspepsia, is pain or discomfort in your chest or stomach. ”
What causes indigestion
“Indigestion is caused by stomach acid coming into contact with the sensitive, protective lining of the digestive system. The stomach acid breaks down the lining, leading to irritation and inflammation ”
What helps indigestion
Antacids
What is a hypothesis
“A prediction of what you think is going to happen in the reaction
”
Excerpt From
Year 10 Chemistry
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Independent variable
“What you are going to change
”
Dependant variable
“What you are going to measure
”
Controlled variable
“What you will keep the same”
Rennies or burpese test
“Crush a Rennies tablet using a mortar and pestle. Weigh 1g of the Rennies powder in a conical flask.
Add 10cm3 water and 4 drops of screened methyl orange to the flask.
Measure 20 cm3 of hydrochloric acid into a measuring cylinder and add the acid to the conical flask drop wise, using a dropper pipette.
When the indicator changes to a pink colour for at least 1 minute, note how much acid was required to carry out the neutralisation.
Weigh 1g of Burpease powder and repeat steps 1-4.”
Apparatus for burpese and rennies test
Measuring cylinder
Dropped pippete
Mass balance
Pestal and mortar
Conical flask
