starter 1) which is the most reactive halogen? bromine chlorine fluorine iodine 2) how many atoms...
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StarterStarter1) Which is the most reactive halogen?brominechlorinefluorineiodine 2) How many atoms are there in a bromine molecule? 3) Which of the following mixtures will not react?a) Chlorine and potassium fluoride solution.b) Chlorine and potassium bromide solution.c) Chlorine and potassium iodide solution.d) Bromine and potassium iodide solution.
4) Which is the least reactive alkali metal?a) lithiumb) sodiumc) potassiumd) francium
Oxygen and oxidationOxygen and oxidation
L.O.:
Explain how to use flame tests to identify the presence of a particular metal.
Know how to collect oxygen produced in reactions
Know a simple laboratory test for oxygenExplain what oxidation is.
Flame testFlame test
Combustion, rusting, oxidation, oxygen
Candle burning in bell jar
• When a substance reacts with oxygen, it gains oxygen and becomes oxidised.
Some oxidation are fast such as combustion. Others are slow, such as rusting.
In groups recap everything you know about oxygen:
o colourless gaso Has no smello Slightly soluble in water.
A test for oxygen.
Oxygen makes a glowing splint relight.
How to collect oxygen.
http://www.youtube.com/watch?v=2Tj3Ir0brco
http://www.youtube.com/watch?v=uifMSZNjJxg
Oxygen and oxidationOxygen and oxidation
L.O.:
Explain how to use flame tests to identify the presence of a particular metal.
Know how to collect oxygen produced in reactions
Know a simple laboratory test for oxygenExplain what oxidation is.
The reactivity seriesThe reactivity series
L.O.:
Remember the reactivity series.Recall a simple test for hydrogen. Recall the products of the reaction between
an acid and a metal.
Demo.
Reaction of acid with metals
potassiumsodiumcalcium
magnesiumaluminium
zincironlead
coppersilvergold
Pleasesend
Charlie’smonkeys
andzebras
inlead
cagessecurelyguarded!
The reactivity seriesThe reactivity series is the list of metals placed in order of their reactivity.
One way to remember this order is to learn this silly sentence:
incr
easi
ng
rea
ctiv
ity
Platinum
What is the order of metals?
Metals and acid – general equationMetals and acid – general equationGold is an unreactive metal that does not react with acid.
When a metal reacts with acid, the products are a metal salt and hydrogen. What is the general equation for the reaction of a metal with acid?
metal acid metal salt hydrogen
How does the type of acid affect the type of salt produced?
Other metals, such as magnesium and zinc, react with acid producing bubbles of gas.
The “squeaky pop” test shows that this gas is hydrogen.
hydrogen+magnesium chloride
→hydrochloric acid
+magnesium
Mg + 2HCl → MgCl2 + H2
hydrogen+aluminium chloride
→hydrochloric acid
+aluminium
2Al + 6HCl → 2AlCl3 + 3H2
hydrogen+zinc chloride
→hydrochloric acid
+zinc
Zn + 2HCl → ZnCl2 + H2
Metals and hydrochloric acidMetals and hydrochloric acidWhat is made when each metal reacts with hydrochloric acid?What is the balanced symbol equation for each reaction?
hydrogen+magnesium sulfate
→sulfuric acid+magnesium
Mg + H2SO4 → MgSO4 + H2
hydrogen+aluminium sulfate
→sulfuric acid
+aluminium
2Al + 3H2SO4 → Al2(SO4)3 + 3H2
hydrogen+zincsulfate
→sulfuric acid
+zinc
Zn + H2SO4 → ZnSO4 + H2
Metals and sulfuric acid – equations
What is made when each metal reacts with sulfuric acid?What is the balanced symbol equation for each reaction?
hydrogen+magnesium nitrate
→nitric acid+magnesium
Mg + 2HNO3 → Mg(NO3)2 + H2
hydrogen+aluminium nitrate
→nitric acid+aluminium
2Al + 6HNO3 → 2Al(NO3)3 + 3H2
hydrogen+zinc nitrate→nitric acid+zinc
Zn + 2HNO3 → Zn(NO3)2 + H2
Metals and nitric acid – equations
What is made when each metal reacts with nitric acid?What is the balanced symbol equation for each reaction?
plenaryplenary
1) Which of the following is a laboratory test for oxygen?
A) A light splint goes popB) A glowing splint ignitesC) A lighted splint goes out
plenaryplenary
2) Which of these four metals listed below is the least reactive
A)PotassiumB)PlatinumC)IronD)Cooper
• 3) Which general equation is correct?A)Acid + metal → salt + waterB)Acid + metal → salt + hydrogenC)Acid + metal → salt + carbon dioxideD)Acid + metal → salt + oxygen
• 4) Which statement is true?A)Platinum reacts violently with hydrochloric
acidB)Sodium reacts with water to give carbon
dioxideC)Iron is more reactive than calciumD)Potassium is more reactive than lithium
Oxygen and oxidationOxygen and oxidation
L.O.:
Explain how to use flame tests to identify the presence of a particular metal.
Know how to collect oxygen produced in reactions
Know a simple laboratory test for oxygenExplain what oxidation is.
Methods of collecting hydrogen
In a gas syringe, over water or by upward delivery.