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Acids and metals. Starter Question. Brainstorming. Write down 5 things you know about acids and metals. Acid, neutral or alkali?. The pH scale. acidic. vinegar. lemon juice. neutral. salt solution. acidic. cream of tartar. alkaline. ammonia. bicarbonate of soda. Everyday Acids.
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Acids and metals Starter Question JMcL 2009
Brainstorming • Write down 5 things you know about acids and metals JMcL 2009
Acid, neutral or alkali? The pH scale acidic vinegar lemon juice neutral salt solution acidic cream of tartar alkaline ammonia bicarbonate of soda JMcL 2009
Everyday Acids • Write down the name of some common acid, alkaline and neutral solutions JMcL 2009
alkali Neutralisation (1) 10 ml acid 10 ml acid 2 ml alkali 4 ml alkali 6 ml alkali 8 ml alkali 10 ml alkali + acid acid alkali acid Acid/Neutral/alkali? neutral JMcL 2009
Neutralisation (2) 10 ml alkali 10 ml alkali 2 ml acid 4 ml acid 6 ml acid 8 ml acid 10 ml acid + acid acid alkali acid neutral acid Acid/Neutral/alkali? JMcL 2009
Acid Put these acid solutions in order (strong to weak) Alkali Put these alkali solutions in order (strong to weak) Strong or weak? W pH12.0 X pH 7.1 Y pH 8.0 Z pH 9.3 A pH2.0 B pH 1.1 C pH 6.8 D pH 5.3 B A D C W Z Y X JMcL 2009
Neutralisation products • What are the two reactants of neutralisation reaction? • What are the two products of a neutralisation reaction? • How do you separate the two products? Acid and alkali Salt and water Remove the water by evaporation the substance left behind is salt JMcL 2009
Investigation • What is the variable you control? • What is the variable you measure? • How will you keep your investigation fair? • What type of graph will you draw? The type of fizzy drink The pH Same volume of drink, same volume of indicator Bar graph JMcL 2009
What is wrong with this bar graph? Bars different widths No labels for bars No label for vertical axis Scale of vertical axis is not regular Ruler was not used correctly to draw one of the bars Investigation 11 10 4 0 Type of drink JMcL 2009
Everyday neutralisation • What would you use to neutralise a bee sting? • What would you use to neutralise a wasp sting? • What would you use to neutralise acid heart burn? • What is used to neutralise plague acid? • What would a gardener use to neutralise an acid soil An alkali- like bicarbonate of soda An acid-like vinegar An alkali-like milk of magnesia The alkali in toothpaste- bicarbonate of soda An alkali- like slaked lime JMcL 2009
Metal and metal compounds • Sort these into 2 groups- metals and compounds calcium sodium nitrite calcium chloride sodium aluminium pentachloride iron magnesium hydroxide aluminium magnesium iron sulphate JMcL 2009
Metal and metal compounds Metal compounds Metals sodium sodium nitrite calcium calcium chloride aluminium aluminium pentachloride magnesium magnesium hydroxide iron iron sulphate JMcL 2009
potassium -flames Sodium-fizzes violently Magnesium- a few bubbles calcuim- lots of bubbles Reactions- metals with water • Put these metals into order (most reactive first) potassium sodium calcium water magnesium JMcL 2009
iron-some bubbles Lead- a few bubbles Magnesium-loads of bubbles gold- no bubbles copper- no bubbles Reactions- metals with acid • Put these metals into order (most reactive first) magnesium iron lead copper=gold acid JMcL 2009
Reactions- Metals with oxygen • Put these metals into order (most reactive first) copper iron gold JMcL 2009
The reactivity series Predict if a reaction occurs • Potassium (most reactive) • Sodium • Lithium • Calcium • Zinc • Iron • Tin • Lead • Copper • Gold • Platinum (least reactive) • Gold and potassium chloride • Potassium and gold chloride • Calcium and tin oxide • Lead and zinc hydride • Lithium and platinum iodide JMcL 2009
+ + + + + + - - - - - - - Splitting compounds • What elements were seen at the electrodes when electricity was passed through copper chloride solution? chlorine copper chloride copper JMcL 2009
Splitting metal compounds • Name the elements produced from splitting these compounds 1. calcium chloride 2. potassium bromide 3. magnesium flouride 4. iron oxide 1. calcium & chlorine 2. potassium & bromine 3. magnesium & flourine 4. iron & oxygen JMcL 2009
Electroplating & Electrolysis • What is electrolysis? • What is electroplating? • Why are some metals electroplated? Using electricity to split a compound into its elements Using electricity to cover one metal with another metal Prevent metal reacting, make more attractive or hard-wearing JMcL 2009
Acids and metals project (1) • Find out about the Klondike Gold Rush Slide 1- Name and title Slide 2- What is gold and what is it used for? Slide 3- Why is gold so expensive? Slide 4- Describe the events of the Klondike Gold Run. Slide 5- Websites used JMcL 2009
Acids and metals project (2) • Find out how metals are extracted from their ores Slide 1- Name and title Slide 2- Use of aluminium Slide 3- How is aluminium extracted? Slide 4- Use of iron Slide 5- How is iron extracted? Slide 6- Use of gold Slide 7- How do we get gold? Slide 8- Websites used JMcL 2009
Acids and metals project (3) • Find out about alloys Slide 1- Name and title Slide 2- What is an alloy? Slide 3- What is bronze? Slide 4- Uses of bronze Slide 5- What is brass? Slide 6- Uses of brass Slide 7- What is steel? Slide 8- Uses of steel Slide 9- What is solder? Slide 10-Uses of solder Slide 11- Websites used JMcL 2009
Revision (1) JMcL 2009
Revision (2) JMcL 2009
Important words • Use these words to help your spelling electrolysis alkali acid iron ore neutralisation substance salt alkaline neutral displacement water acidic electroplating JMcL 2009
