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Calderglen High School
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Calderglen High School
Give an everyday example Give an everyday example of neutralisation.of neutralisation.
Reducing acidity in soil Reducing acidity in soil by adding lime, by adding lime,
treatment of acid treatment of acid indigestionindigestion
answer
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Calderglen High School
What is Neutralisation?
The reaction of The reaction of an acid with a an acid with a base to form base to form
waterwater
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What happens to the pH of an acid as it is neutralised?
The pH INCREASES to The pH INCREASES to 77
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Give some examples of neutralisers
Alkali (metal Alkali (metal hydroxide),hydroxide),
metal oxide, metal oxide, metal carbonatemetal carbonate
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Name the products of the reaction between a dilute
acid and an alkali
Salt and waterSalt and water
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Name the products in the reaction between a dilute acid
and a metal carbonate.
Salt, water and carbon dioxide
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Name the salt produced when dilute hydrochloric acid reacts with copper carbonate
Copper Copper chloridechloride
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Name the products of the reaction between a dilute acid
and a metal oxide
Salt and Salt and waterwater
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Name the products when Name the products when dilute sulphuric acid reacts dilute sulphuric acid reacts
with magnesiumwith magnesium
Magnesium Magnesium sulphate and sulphate and
hydrogenhydrogen
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What is the formula for
hydrochloric acidhydrochloric acid?
HCHCll
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What is the formula for
sulphuric acidsulphuric acid?
HH22SOSO44
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Name the products of the reaction between
potassium hydroxidepotassium hydroxide and dilute nitric acidnitric acid
potassium potassium nitrate and nitrate and
waterwater
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Which method is used to prepare insolubleinsoluble salts?
precipitatiprecipitationon
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Name the precipitate formed when barium nitrate solution and sodium sulphate solution
react together
Barium Barium sulphatesulphate
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NaOH + HNO3 NaNO3 + H2OIn a titration, 20cm3 of sodium hydroxide
was neutralised by 15cm3 of 0.2 mol/l nitric acid. Calculate the concentration of
the sodium hydroxide solution.
15
answerCVH+ (acid) = CVOH- (alkali)
0.2 x15x1 = Cx20x1
3= C x 20
C = 3/20 = 0.15 mol/l
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What is a basebase?
A substance which A substance which neutralises an acidneutralises an acid
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Give three examples of a base.
alkali (metal hydroxide)metal oxide
metal carbonate
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Identify the two bases.sodium chloride, sodium oxide,
calcium nitrate, copper carbonate
sodium oxide and copper carbonate
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Name the type of chemical type of chemical reactionreaction taking place when
copper oxide is added to dilute hydrochloric acid.
neutralisatineutralisationon
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What is formed when a base dissolves in water?
An alkaliAn alkali
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AgNO3 (aq) + NaCl (aq) AgCl (s) + NaNO3 (aq)
Name the typetype of chemical reaction taking place.
precipitatiprecipitationon
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AgNO3 (aq) + NaCl (aq) AgCl (s) + NaNO3 (aq)
Name the spectator ions
Nitrate NO-
3
Sodium Na+
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What happens to the pHpH of an acid when diluted with water?
It iinncreases to
7
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What happens to the pH of an
ALKALIALKALI when diluted with water ?
It ddeeccrreeaasseses to
7
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What happens to the acidityacidity of an acid when diluted with water ?
The acidity
decreases(less acidic)
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What happens to the alkalinityalkalinityof an alkali when diluted with
water?
It decreases -becomes less alkaline
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What happens to the concentration concentration of Hof H++ ions in an acid when diluted with water?
The concentration
decreases
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What happens to the concentration of OHconcentration of OH-- ions in an
alkali when diluted with water ?
The concentration
decreases
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What is the formula for
nitric acidnitric acid?
HNOHNO33
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What could you use to show you have reached the
end-point of a neutralisation reaction?
Use an Use an indicatindicat
oror
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