Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Rusting Reactivity
Edexcel International Rusting and Reactivity
| Question | Answer |
|---|---|
| What are the two chemicals needed for Iron to rust? | Water and Oxygen |
| What is the word equation of the reaction of Iron and Water to make Rust (Hydrated Iron Oxide)? | Iron + Water + Oxygen Hydrated Iron Oxide |
| What is the formula for hydrated iron oxide? | Fe3O2.H2O |
| Write the balanced equation of when iron reacts with water. | 4Fe + 3O2 + 2H2O -> 2Fe2O3 .H2O |
| Describe five ways to stop the corrosion of metals. | Galvanising , Cover with tin or paint or plastic or oil/grease |
| Explain why Aluminium, despite being very reactive, seems not to be corroded and can even hold some acidst | Aluminium reacts quickly with Oxygen, and forms a layer of Aluminium Oxide that is very unreactive, even against acids |
| Explain why stainless steel does not rust | Chromium is more reactive than Iron so the chromium reacts with oxygen first (before Iron) and forms a layer that prevents the oxygen from getting to the Iron |
| Explain why galvanised iron does not rust | The zinc covering the Iron is more reactive than Iron; Zinc will reacts reacts with Oxygen rather than the Iron |
| Explain why cans rust only when dented | the inside of the can is covered in Tin, a metal low in the reactivity series; Tin will not react with acids or oxygen; however when the tin is dented, the iron is exposed and the iron reacts with the acid or oxygen and is corroded |
| Design an experiment to show the effect of increasing the mass salt on the rate of rusting | CONTROL: identical iron nail; volume of water; temperature room; left for same length of time; INDEPENDENT place increasing mass salt in each tube (0 to 4 g); DEPENDENT=weigh the tube at start; observe the increase in mass of the tube after a week |
| Why do you need at least 5 different mass of salt when investigating the effect of increasing the mass salt on the increase of mass of a nail after a week rusting? | 5 points on a graph gives you more confidence in the shape of the line of best fit |
| Why do you need to repeat each different mass at least 3 times when investigating the effect of increasing the mass salt on the increase of mass of a nail after a week rusting? | you RRRRepeat to make the RRRRRResults RRRRReliable |
| Describe how sacrificial protection works | It is using a metal more reactive than iron to coat the iron; when oxygen and water are present, the more reactive metal will react first and get corroded first, rather than iron: the more reactive metal has been sacrificed.... |
| Place the following metals in order of reactivity (most reactive first): Copper, Zinc, Potassium, Gold, Iron, Aluminium | Potassium, Aluminium, Zinc, Iron, Copper, Gold. Try this Mnemotechnic: “Pretty Sally Could Marry A Crazy Zulu In Tree Lined House Causing Strangely Glancing People.” |
| Write the word equation when Iron reacts with copper sulfate | Iron + Copper sulfate --> Iron Sulfate + Copper |
| Predict the products when Iron is placed in Copper Sulfate | Copper and Iron Sulfate |
| What would you observe when Iron is placed in Copper Sulfate | 1) Identify the products: Copper and Iron Sulfate; 2) Learn colours: Copper Sulfate is blue; Iron Sulfate is very pale green; Copper metal is orange; 3)answer: it would go from a blue solution to a pale green solution |
| What is the red brown metal formed when Iron is placed in Copper Sulfate | 1) Identify the products: Copper and Iron Sulfate; 2) Learn colours: Copper Sulfate is blue; Iron Sulfate is very pale green; Copper metal is orange; 3)answer: the red-brown metal must be copper (NOT RUST!!!!) |
| Explain why Iron reacts with Copper Sulfate | Because Iron is more REACTIVE than Copper, so iron can “steals” the sulfate from copper (do not say “stronger”) |
| Explain why there is no reaction when you place Copper in Iron Sulfate | Because Copper is less REACTIVE than Iron so Copper can NOT steal the sulfate from the iron... (do not say “stronger”) |
| Define oxidation in terms of loss or gain of oxygen | Oxidation is a gain of oxygen: in a symbolic equation, you would see an element without oxygen on the left and the same element WITH oxygen on the right |
| Define reduction in terms of loss or gain of oxygen | Reduction is a loss of oxygen: in a symbolic equation, you would see an element WITH oxygen on the left and the same element without oxygen on the right |
| In this equation which element is oxidised? Mg + CuO -> MgO + Cu | Mg, because Mg gains oxygen:, Mg does not have any oxygen attached on the left but Mg and O are joined on the right |
| What is the mnemotechnic to remember the definitions of oxidation and reduction in terms of loss or gain of electrons? | OILRIG: oxidation is loss, reduction is gain of electrons |
| Define oxidation in terms of loss or gain of electrons | Oxidation is a loss of electrons: in a symbolic equation, you would see an element without charges and a positive ion on the left on the right |
| Define reduction in terms of loss or gain of electrons | Reduction is a gain of electrons: in a symbolic equation, you would see a positive ion on the left and the same element without charges on the right |
| HIGHER TIER: What is the IONIC equation for the following reaction: Fe + CuSO4 --> Cu + FeSO4 | Fe + Cu+2 --> Fe+2 + Cu; the SO4 ion does not appear as it remains the same as a reactant and product |
| HIGHER TIER: Why is the reaction between Iron and Copper sulfate Fe + Cu+2 --> Fe+2 + Cu, a redox reaction in terms of electrons? | The ionic equation is Fe + Cu+2 --> Fe+2 + Cu; Fe is losing two electrons so Fe is oxidised; Copper is gaining electrons, so Copper is reduced |
| What is an ore? | Rocks that contain enough of a metal compound so that profit can be made when you extract the metal from the metal oxide |
| "Aluminium + Oxygen --> Aluminium Oxide". What type of reaction is it? | Oxidation |
| Name a metal that can be extracted by heating with Carbon | Zinc, Iron or any metal lower than Carbon in the Reactivity Series |
| "Aluminium + Iron Oxide --> Aluminium Oxide + Iron". What chemical is oxidised? | Aluminium |
| "Aluminium + Iron Oxide --> Aluminium Oxide + Iron". What chemical is reduced? | Iron Oxide |
| When you heat Tin Oxide with Carbon, you can extract Tin. Write the word equation. | Tin Oxide + Carbon --> Tin + Carbon Dioxide |
| Balance the following equation:__ PbO + __ C --> __ Pb + __ CO2 | 2 PbO + 1 C --> 2 Pb + 1 CO2 |
| Balance the following equation:___ Zn + ___ O2 --> ___ ZnO | 2 Zn + 1 O2 --> 2 ZnO |
| CHALLENGE: Why is Aluminium used for making cans even when Aluminium is so reactive? | Aluminium reacts very quickly with Oxygen to form a thin layer of Aluminium Oxide. The Aluminium Oxide is NOT reactive. |
| To make Iron, Iron Oxide is heated with Carbon Monoxide and Carbon Dioxide is formed. Write the word equation for the extraction of Iron. | Iron Oxide + Carbon Monoxide --> Iron + Carbon Dioxide |
| HIGHER: What is reduced in 1 Ca + 2 H(+1) --> 1 Ca(+2) + 1 H2 | the Hydrogen ion as they are gaining electrons (it goes from a +1 charge to 0 (zero charge) |
| How do you work out the formula of Calcium Chloride | CHARGES: Calcium is +2 ion as it is in group 2; Chloride is -1 ion as it is in group 7; SWAP: Ca1Cl2 |
| How do you work out the formula of Magnesium Nitrate | CHARGES: Magnesium is +2 ion as it is in group 2; Nitrate is (NO3)-1 ion LEARN; SWAP: Mg1(NO3)2 |
| How do you work out the formula of Copper(II) Sulfate | CHARGES: Copper is +2 ion as indicated by (II); sulfate is (SO4)-2 LEARN; SWAP: Cu2(SO4)2; and cancel both “2s” |
| State 4 observations when you place an alkali metal in water | the fantastic 4"f": Float on water, fizz, flame and gets fmaller |
| What are the product of reaction between Sodium and water? | Sodium Hydroxide and Hydrogen gas |
| Write the word equation for the reaction of Lithium and water | Lithium + Water --> Lithium Hydroxide + Hydrogen; LEARN PATTERN |
| Write the formula of potassium hydroxide | KOH |
| What is the formula of Hydrogen gas? | H2 |
| Write the symbolic equation for the reaction of potassium and Water | 2 K + 2 H2O --> 2 KOH + H2; learn the pattern (metal+water--> hydrogen + metal hydroxide); CHECK FORMULAE; this is not an easy equation to balance so maybe learn it altogether? |
| Which alkali metal is the most reactive? Li, Na or K | K |
| (HIGHER) Balance the half-equation: Al+3 + ____ e- --> Al | Al+3 + 3 e- --> Al |
| (HIGHER) is this half-equation representing an oxidation or a reduction? Explain why. Mg --> Mg+2 + 2e- | Mg --> Mg+2 + 2e- is an oxidation because electrons are LOST (OILRIG: Oxidation is Loss and Reduction is Gained) |
Created by:
ursulinechem2
Popular Chemistry sets