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# BTEC inorganic

### BTEC inorganic group 2 and 7 period 3

write the balanced equation for the reaction between oxygen and sodium 4 Na + O2 --> 2 Na2O; 1)write the word equation, 2)check formulae (swap the charges) 3)balance
write the balanced equation for the reaction between oxygen and magnesium 2 Mg + O2 --> 2 MgO; 1)write the word equation, 2)check formulae (swap the charges) 3)balance
write the balanced equation for the reaction between oxygen and aluminium 4 Al + 3 O2 --> 2 Al2O3; 1)write the word equation, 2)check formulae (swap the charges) 3)balance
write the balanced equation for the reaction between oxygen and silicon Si + O2 --> SiO2; 1)write the word equation, 2)check formulae (swap the charges) 3)balance
write the balanced equation for the reaction between oxygen and phosphorus P4 + 5 O2 --> P4O10 OR P4 + 5O2 --> 2 P2O5; 1)write the word equation, 2)check formulae (check charges OR learn P4O10) 3)balance
write the balanced equation for the reaction between oxygen and sulfur to produce SO2 S + O2 --> SO2 (OR 2 S + 3 O2--> 2 SO3); 1)write the word equation, 2)they should tell you if the product is SO2 or SO3 3)balance [note that in nature, sulfur is found as S8, but most boards accept S to balance the equation]
what is the formula of Sodium Oxide? Na2O; (1)look up the charges on the periodic table (group 1=+1, group 2=+2 etc...) so Na+1 and O-2 (2)swap the charges
what is the formula of Magnesium Oxide? MgO; (1)look up the charges on the periodic table (group 1=+1, group 2=+2 etc...) so Mg+2 and O-2 (2)swap the charges, here they cancel out
what is the formula of Aluminium Oxide? Al2O3; (1)look up the charges on the periodic table (group 1=+1, group 2=+2 etc...) so Al+3 and O-2 (2)swap the charges
what is the formula of Silicon Oxide? SiO2; (1)look up the charges on the periodic table (group 1=+1, group 2=+2 etc...) so Si+4 and O-2 (2)swap the charges
what is the formula of Sulfur dioxide? SO2; the clue is in the name DIoxide means TWO oxides
what is the formula of Phosphorus Oxide? P2O5 or P4O10; learn it!
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.”
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”
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: teh 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
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...
Write the word equation when Iron reacts with copper sulfate Iron + Copper sulfate  Iron Sulfate + Copper
CHALLENGE: 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
CHALLENGE: Why is the reaction between Iron and Copper sulfate 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
"Aluminium + Iron Oxide --> Aluminium Oxide + Iron". What chemical is oxidised? Aluminium
"Aluminium + Iron Oxide --> Aluminium Oxide + Iron". What chemical is reduced? Iron Oxide
What is the salt made when Aluminium reacts with Sulphuric Acid? Work out the formula of the salt Aluminium Sulphate; find out charges from Periodic table or LEARN special groups: Al+3 and (SO4)-2; then swap numbers Al2(SO4)3
What is the salt made when Calcium reacts with Sulfuric Acid? Work out the formula of the salt Calcium Sulfate Ca(SO4) find out charges from Periodic table or LEARN special groups: Ca+2 and (SO4)-2; then swap numbers; here the charges cancel Ca(SO4)
What is the salt made when Zinc reacts with Hydrochloric Acid? Work out the formula of the salt Zinc Chloride
What is the salt made when Magnesium reacts with Sulphuric Acid?Work out the formula of the salt Potassium Sulphate; Mg(SO4); find out charges from Periodic table or LEARN special groups: Mg+2 and (SO4)-2; then swap numbers; here the charges cancel Mg(SO4)
What is the acid needed to make Potassium Sulphate? What is the formula of this acid Sulphuric Acid; H2SO4
What is the acid needed to make Potassium Nitrate? What is the formula of this acid Nitric Acid; HNO3
What is the acid needed to make Potassium Chloride? What is the formula of this acid Hydrochloric Acid HCl
What is the formula of Nitric Acid? HNO3
What is the formula of Sulfuric Acid? H2SO4
What is the formula for HydroChloric Acid? HCl
What is the word equation for the reaction between dilute sulfuric acid and Zinc Oxide? Sulfuric Acid + Zinc Oxide --> Zinc Sulfate + Water (do not get fooled by "dilute": it is simply water; it does not react)
What is the word equation for the reaction between dilute sulfuric acid and Zinc Carbonate? Sulfuric Acid + Zinc Carbonate --> Zinc Sulfate + Water + Carbon Dioxide (do not get fooled by "dilute": it is simply water; it does not react)
What is the word equation for the reaction between dilute sulfuric acid and Zinc? Sulfuric Acid + Zinc Oxide --> Zinc Sulfate + Hydrogen (do not get fooled by "dilute": it is simply water; it does not react)
What are the two products formed when you react an ACID with a metal? a salt (the name of the salt is the first word of the acid and the metal) and HYDROGEN
What type of chemical reacts with an Acid to produce Hydrogen gas? a (reactive) metal
What is the word equation for the reaction between dilute Nitric acid and Calcium? Calcium + Nitric acid --> Calcium Nitrate + Hydrogen
Balance the following equation ___Ca + ___HNO3 --> ___Ca(NO3)2 + ___H2 1 Ca + 2 HNO3 -->1 Ca(NO3)2 + 1 H2
What is the word equation for the reaction between dilute Hydrochloric acid and Magnesium? Magnesium + Hydrochloric acid --> Magnesium Chloride + Hydrogen
Balance the following equation ___Mg + ___HCl --> ___MgCl2 + ___H2 1 1 Mg + 2 HCl --> MgCl2 + H2
What is the word equation for the reaction between dilute Sulfuric acid and Magnesium? Magnesium + Sulfuric acid --> Magnesium Sulfate + Hydrogen
Balance the following equation ___Mg + ___H2SO4 --> ___Mg(SO4) + ___H2 1 Mg + 1 H2SO4 --> 1 Mg(SO4) + 1 H2
What is the word equation for the reaction between dilute Hydrochloric acid and Calcium? Calcium + Hydrochloric acid --> Calcium Chloride + Hydrogen
Write the balanced equation between Calcium and Hydrochloric acid 1 Ca + 2 HCl --> 1 CaCl2 + 1 H2
What are the names of the Halogens as you go down the group? Fluorine, Chlorine, Bromine, Astatine
What is the formula of Chlorine? Cl2
What is the formula of Sodium Bromide? NaBr
What are the products of reaction between Chlorine and Sodium Bromide Bromine and Sodium Chloride
What is the pattern of reactivity as you go down the group? As you go down the group, the Halogens become less reactive
Which Halogen is the most reactive? Chlorine, Iodine or Bromine? Chlorine
Write the symbolic equation for the reaction between Chlorine and Sodium Bromide Cl2 + 2 NaBr ---> Br2 + 2 NaCl
What is the product of the reaction between Hydrogen and Chlorine? Hydrogen Chloride
What is the pH of Hydrogen Bromide solution? below 7 (an acid)
Write the symbolic equation for the reaction between Chlorine and Hydrogen Cl2 + H2 --> 2 HCl
What is the colour and state of Chlorine? Green gas
What is the colour and state of Bromine? Brown liquid
What is the colour and state of Iodine? Grey solid
What colours are the vapours of Iodine? Purple
What is the product of the reaction between Iron and Chlorine? Iron Chloride
What is the colour and state of Fluorine? Pale yellow gas
Colour of Chlorine SOLUTION Pale green
Colour of Bromine SOLUTION Orange-Brown
Colour of Iodine SOLUTION Brown
Colour of Sodium Iodide SOLUTION Colourless
Word equation for the reaction of Chlorine and Sodium Bromide; what colour change would you expect? Chlorine + Sodium Bromide --> Sodium Chloride + Bromine; you would see the colour changing from pale green (Chlorine) to brown (Bromine)
Word equation for the reaction of Bromine and Sodium Chloride; what colour change would you expect? There would be no reaction because Bromine is less reactive than Chlorine so the Chlorine would not let Bromine take the Sodium! No colour change!
Formula of Iodine? I2
Formula of Sodium Chloride? NaCl
Formula of Iron(III)Chloride? FeCl3; the (III) tells you that the charge on Iron is +3; then swap charges as usual
Created by: ursulinephys