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ks3 chem reactions
Question | Answer |
---|---|
What is the equation for the combustion of Methane? | Methane + Oxygen --> Carbon Dioxide + Water |
What are the products formed during the combustion of Methane? | Carbon Dioxide + Water |
What are the products in this reaction “copper sulfate + magnesium --> magnesium sulphate + copper”? | magnesium sulphate + copper |
What is the equation for the reaction between copper sulfate and magnesium? | copper sulfate + magnesium --> magnesium sulphate + copper |
What type of reaction is Methane + Oxygen --> Carbon Dioxide + Water? | Oxidation |
What type of reaction is rusting (Iron + Oxygen --> Iron Oxide)? | Oxidation |
What type of reaction is Magnesium + Oxygen --> Magnesium Oxide? | Oxidation |
What gas is formed when Sodium Carbonate reacts with an Acid? | Carbon Dioxide |
What gas is produced when a metal reacts with an acid? | Hydrogen |
What type of reaction is this reaction: Copper Carbonate --> Copper Oxide + Carbon Dioxide? | Thermal decomposition (because it is ONE reactant but TWO products) |
What type of reaction is this reaction: Calcium Hydroxide + Nitric Acid--> Calcium Nitrate + Water? | Neutralisation (because it is about an acid) |
What is the difference between the mass of the reactants and the mass of the products during a chemical reaction? | It stays the same |
Why does the mass seems to decrease during the reaction between Sodium Carbonate and Nitric Acid? | Because a gas is made (Carbon Dioxide) and the gas escapes |
Why does the mass seem to increase when you burn Magnesium? | because you forgot to weigh the Oxygen at the start |
What is the test for Carbon Dioxide? | Limewater will turn milky/cloudy |
What is the test for Oxygen? | it will relight a glowing splint |
What is the test for Water? | Cobalt chloride from blue to pink |
How do you know a chemical change is happening? | Fizzing, colour change, temperature change |
What is the formula for Hydrochloric Acid? | HCl |
What is the gas that relights a glowing splint? | Oxygen |
What is the gas turns Limewater milky/cloudy? | Carbon Dioxide |
magnesium burns brightly in air. A white powder was formed.What is the name of the powder? | Magnesium Oxide (did you try to write the word equation? Magnesium + Oxygen --> Magnesium Oxide) |
A reaction takes place between the iron and the copper sulphate. Describe one change you would see on the surface of the nail. | The nail would get covered in orange copper (did you try to write the word equation? iron + copper sulfate --> iron sulphate + copper) |
Nitric acid reacts with sodium carbonate. The salt formed is a nitrate. Fill in the gaps to complete the word equation: Sodium Carbonate + _____________ --> _________________ + Carbon Dioxide + Water | Sodium Carbonate + Nitric Acid--> Sodium Nitrate + Water + Carbon Dioxide |
some copper carbonate is heated in a crucible. The mass of the crucible and the Copper Carbonate is 51.84g before heating and 50.20g after heating. How much carbon Dioxide is lost? | 51.84-50.20=1.64g |
Give the two products formed by the reaction which occurs when zinc is placed into a solution of copper sulphate | Zinc Sulfate and Copper (did you try to write the word equation? Zinc + Copper Sulfate --> Zinc Sulfate + Copper) |
When calcium hydroxide reacts with sulphuric acid a calcium salt is formed. What is the name of this salt? | Calcium Sulfate |
When magnesium reacts with hydrochloric acid a salt is formed. What is the name of this salt? | Magnesium Chloride |
Use the equation to explain why a fizz is observed: magnesium + hydrochloric magnesium chloride + hydrogen | Hydrogen is a gas |
Calcium nitrate can be made from the reaction between calcium hydroxide and an acid. Complete the word equation for the reaction. Calcium Hydroxide + _________________ --> Calcium Nitrate + _______________ | Calcium Hydroxide + Nitric Acid --> Calcium Nitrate + Water |
What is the test for Hydrogen gas? | Hydrogen gas POPS when burned |