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Published byTeguh Gunawan Modified over 6 years ago
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Making salts All Must: Be able to describe how to neutralise an acid
Most Must: Write a word equation for neutralisation Some Must: Explain what salt is produced with hydrochloric acid
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What is this and why is it used?
Key Words Neutralisation Salt Copper sulphate What is this and why is it used?
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acid + alkali salt + water
Neutralisation What happens when you add a acid to an alkali? acid + alkali salt + water Acids react with alkalis to produce two neutral products.
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A neutralisation reaction is where an acid reacts with a base to produce a neutral solution of a salt and water. sodium hydroxide pH 14 neutralisation sodium chloride pH 7 hydrochloric acid pH 1 1 2 14 13 12 11 10 9 8 7 6 5 4 3 Increasingly acid Increasingly alkali
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Common Acids are: Name of acid Formula Sulphuric acid Hydrochloric
Nitric acid Ethanoic (vinegar) H2SO4 HCl HNO3 CH3COOH
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Common alkalis are: Name of alkali Formula Sodium Hydroxide
Potassium Oxide Calcium Carbonates Ammonium Hydroxide NaOH KO CaO3 NH4OH
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Sulphuric acid Nitric acid Sulphates Nitrates Hydrochloric acid
Salts Sulphuric acid Nitric acid Sulphates Nitrates Hydrochloric acid Chlorides
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All these are alkalis – that will neutralise an acid
Type of compound Contain React with acids to give Metal Hydroxides Metal Oxides Metal Carbonates OH- water + a salt O2- water + a salt CO32- water + a salt + CO2
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Naming salts 1 The first part of the name of the salt comes from the first name of the base (alkali) So Ammonium hydroxide gives ammonium ………… Magnesium oxide gives magnesium …………... 2 The acid gives the last part of the name of the salt. So Sulphuric acid make sulphates Nitric acid makes nitrates Hydrochloric acid makes chlorides Eg. Sodium hydroxide + nitric acid forms: Calcium carbonate + sulphuric acid forms: Sodium nitrate calcium sulphate
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Practical with copper sulphate
What is the acid in our practical? dilute sulphuric acid What is the alkali in our practical? Copper oxide What is the name of the salt? Copper sulphate
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Practical making copper sulphate
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Naming salts
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Naming salts Hydrochloric acid + Sodium hydroxide Sodium chloride
water Lithium hydroxide ……………….. chloride Potassium hydroxide ……………….. ……………….. …………………
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Naming salts Hydrochloric acid + potassium hydroxide
……………….. ……………….. …………… Sulphuric acid Lithium hydroxide ……………….. sulphate Nitric acid
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Plenary Tim and Moby Revision video
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Key word bingo Salt Sodium chloride neutralisation Potassium nitrate
alkali reaction water acid corrosive Lithium chloride Cleaning products pH scale Magnesium nitrate indicator
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