can you identify all bases?€¦ · •bases - a chemical which reacts with an acid to form a salt...

Acids and Metal oxides ©cgrahamphysics.com 2016

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Page 1: Can you identify all bases?€¦ · •Bases - A chemical which reacts with an acid to form a salt •Alkaline - Substance that turns litmus blue. Has a pH of more than 7. An alkaline

Acids and Metal oxides ©cgrahamphysics.com 2016

Can you identify all bases?

©cgrahamphysics.com 2016

Starter Write out the word equation (and symbol if you can!) for

• zinc reacting with hydrochloric acid • zinc + hydrochloric acid zinc chloride + hydrogen • Zn + 2HCl ZnCl2 + H2

• magnesium reacting with sulfuric acid • magnesium + sulfuric acid zinc sulfate + hydrogen • Mg + H2SO4 MgSO4 + H2

• sodium reacting with nitric acid • sodium + nitric acid sodium nitrate + hydrogen • 2Na + 2HNO3 2NaNO3 + H2

©cgrahamphysics.com 2016

Page 4: Can you identify all bases?€¦ · •Bases - A chemical which reacts with an acid to form a salt •Alkaline - Substance that turns litmus blue. Has a pH of more than 7. An alkaline

Aim • By the end of this lesson I will be able to use word

equations to describe the reaction between acids and metal oxides.

Key words

• Bases

• Alkaline

• Neutralization

• General equation for mixing an acid and an alkaline

©cgrahamphysics.com 2016

Page 5: Can you identify all bases?€¦ · •Bases - A chemical which reacts with an acid to form a salt •Alkaline - Substance that turns litmus blue. Has a pH of more than 7. An alkaline

The bigger picture

Have you ever wondered

How do we use the word base? ©cgrahamphysics.com 2016

Page 6: Can you identify all bases?€¦ · •Bases - A chemical which reacts with an acid to form a salt •Alkaline - Substance that turns litmus blue. Has a pH of more than 7. An alkaline

Bases and alkaline

• A base is the opposite of an acid

• A base has a pH value greater than 7

• A soluble base is called an alkali

• There are three common alkalis we use in the lab: - a metal oxide - a metal hydroxide - a metal carbonate

©cgrahamphysics.com 2016

Page 7: Can you identify all bases?€¦ · •Bases - A chemical which reacts with an acid to form a salt •Alkaline - Substance that turns litmus blue. Has a pH of more than 7. An alkaline

9E What happens to the atoms?

What is the GENERAL WORD

EQUATION for these reactions?

copper sulphate + water copper oxide + sulphuric acid

water + magnesium chloride

magnesium oxide

hydrochloric acid

Acids and metal oxides

©cgrahamphysics.com 2016

Page 8: Can you identify all bases?€¦ · •Bases - A chemical which reacts with an acid to form a salt •Alkaline - Substance that turns litmus blue. Has a pH of more than 7. An alkaline

metal oxide + acid a salt + water

water + zinc sulphate sulphuric acid + zinc oxide

water + sodium chloride

hydrochloric acid

+ sodium oxide

water + iron nitrate nitric acid + iron oxide

Acids and metal oxides

©cgrahamphysics.com 2016

Page 9: Can you identify all bases?€¦ · •Bases - A chemical which reacts with an acid to form a salt •Alkaline - Substance that turns litmus blue. Has a pH of more than 7. An alkaline

Metal oxide + acid Steps 1 and 2 in the beaker Step 3 in a conical flask

©cgrahamphysics.com 2016

Page 10: Can you identify all bases?€¦ · •Bases - A chemical which reacts with an acid to form a salt •Alkaline - Substance that turns litmus blue. Has a pH of more than 7. An alkaline

9E Acids and metal oxides

Copper oxide and sulphuric acid

©cgrahamphysics.com 2016

Page 11: Can you identify all bases?€¦ · •Bases - A chemical which reacts with an acid to form a salt •Alkaline - Substance that turns litmus blue. Has a pH of more than 7. An alkaline

Plenary

• On your mini-whiteboard write an exam question relating today’s lesson. Give it to your partner to answer.

©cgrahamphysics.com 2016

Key words

• Bases - A chemical which reacts with an acid to form a salt

• Alkaline - Substance that turns litmus blue. Has a pH of more than 7. An alkaline is a soluble base.

• Neutralization - Mixing an acid and a base together to make a solution with a pH of 7.

• General equation for mixing an acid and an alkaline – acid + alkaline salt + water

©cgrahamphysics.com 2016

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About LiTmus

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LITMUS Meroform -

kertas litmus merupakan alat untuk mengukur bahan yang mempunyai asid atau alkaline

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