Question | Answer |
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 ā2sā |
What happens when there is excess Hydrochloric acid in the stomach? | Indigestion |
What is the name of the technique used to find out EXACTLY how much alkali there is in an indigestion tablet? | Titration |
What is the salt made when Sodium Hydroxide reacts with Sulphuric Acid? Work out the formula of the salt | Sodium Sulphate; find out charges from Periodic table or LEARN special groups: Na+1 and (SO4)-2; then swap numbers Na2(SO4) |
What is the salt made when Calcium Hydroxide reacts with Nitric Acid? Work out the formula of the salt | Calcium Nitrate; find out charges from Periodic table or LEARN special groups: Ca+2 and (NO3)-1; then swap numbers Ca(NO3)2 |
What is the salt made when Potassium Hydroxide reacts with Hydrochloric Acid? Work out the formula of the salt | Potassium Chloride; find out charges from Periodic table or LEARN special groups: K+1 and Cl-1; then swap numbers K1Cl1 |
What is the salt made when Potassium Carbonate reacts with Sulphuric Acid? Work out the formula of the salt | Potassium Sulphate; find out charges from Periodic table or LEARN special groups: K+1 and (SO4)-2; then swap numbers K2(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 Nitric? 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 |
Name the acid found in the stomach | Hydrochloric acid |
What is the TWO roles of Hydrochloric acid in the stomach? | help digestion and kill bacteria |
What kind of chemicals are chemicals that help remedy indigestion? | Alkalis |
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) |
Define electrolysis | When a COMPOUND is split/broken down into its ELEMENTS, when electricity is passed through the compound [Have you used the correct keywords] |
What are the two products formed when you react an ACID with a metal OXIDE? | a salt (the name of the salt is the first word of the acid and the metal) and WATER |
What are the two products formed when you react an ACID with a metal HYDROXIDE? | a salt (the name of the salt is the first word of the acid and the metal) and WATER |
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 GAS |
What are the two products formed when you react an ACID with a metal CARBONATE? | a salt (the name of the salt is the first word of the acid and the metal) and WATER and CARBON DIOXIDE |
What type of chemical reacts with an Acid to produce Water? | either a Metal Oxide or a Metal Hydroxide |
What type of chemical reacts with an Acid to produce Hydrogen gas? | a (reactive) metal |
What type of chemical reacts with an Acid to produce Water and Carbon Dioxide gas? | a metal Carbonate |
Why do we pass gases from chemical industry through Calcium Carbonate | To neutralise (1) the acidic gases (1) |
What is the name of the reaction between an acid and a carbonate? | Neutralisation |
What type of chemical is an antiacid? | An alkali |
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 |
HIGHER: What is the ionic equation for 1 Ca + 2 HNO3 --> 1 Ca(NO3)2 + 1 H2 | 1 Ca + 2 H^(+1 )--> 1 Ca^(+2) + 1 H2 |
What is the word equation for the reaction between dilute Nitric acid and Calcium Hydroxide? | Calcium Hydroxide + Nitric acid --> Calcium Nitrate + Water |
Balance the following equation ___Ca(OH)2 + ___HNO3 --> ___Ca(NO3)2 + ___H2O | 1 Ca(OH)2 + 2 HNO3 --> 1 Ca(NO3)2 + 1 H2O |
What is the word equation for the reaction between dilute Nitric acid and Magnesium Carbonate? | Magnesium Carbonate + Nitric acid --> Magnesium Nitrate + Water + Carbon Dioxide |
Balance the following equation ___Mg(CO3) + ___HNO3 --> ___Mg(NO3)2 + ___H2O + __CO2 | 1 Mg(CO3) + 2 HNO3 --> 1 Mg(NO3)2 + 1 H2O + 1 CO2 |
What is the word equation for the reaction between dilute Hydrochloric acid and Calcium? | Calcium + Hydrochloric acid --> Calcium Chloride + Hydrogen |
Balance the following equation ___Ca + ___HCl --> ___CaCl2 + ___H2 | 1 Ca + 2 HCl --> 1 CaCl2 + 1 H2 |
What is the word equation for the reaction between dilute Hydrochloric acid and Calcium Hydroxide? | Calcium Hydroxide + Hydrochloric acid --> Calcium Chloride + Water |
Balance the following equation ___Ca(OH)2 + ___HCl ļ ___CaCl2 + ___H2O | 1 Ca(OH)2 + 2 HCl --> 1 CaCl2 + 1 H2O |
What is the word equation for the reaction between dilute Hydrochloric acid and Calcium Carbonate? | Calcium Carbonate + Hydrochloric acid --> Calcium Chloride + Water + Carbon Dioxide |
Balance the following equation ___CaCO3 + ___HCl --> ___CaCl2 + ___H2O + ___ CO2 | 1 Ca(OH)2 + 2 HCl --> 1 CaCl2 + 1 H2O + 1 CO2 |
You are given solutions of sodium hydroxide and ammonia of the same concentration. Describe and give the results of a test to show that sodium hydroxide is a stronger alkali than ammonia solution | Add universal indicator; ammonia would go blue (pH of 9or10) whilst sodium hydroxide go purple (pH=12to14) OR (TRIPLE ONLY) do a titration with HCl; you would need more HCl for Sodium Hydroxide |
TRIPLE ONLY: Sodium hydroxide is a strong alkali. In terms of ionisation, what is meant by the word strong? | A STRONG alkali (or acid) is TOTALLY dissociated |
Name or give the formula of the ion that makes solutions alkaline. | Hydroxide ions (OH)-1 |
Name or give the formula of the ion that makes solutions acidic | Hydrogen ions (H)+1 |
Describe how you would collect pure dry crystals of Copper Sulphate from Sulfuric acid and Copper Oxide | YOU MUST LEARN THIS! Warm the Sulfuric acid; Add Copper Oxide to Sulfuric Acid; until Copper Oxide does not dissolve anymore; filter the excess of Copper Oxide; heat gently until the first crystals form; leave to to crystallise further at room temperature |
(HIGHER) What is the ionic equation for the reaction between an acid and an alkali | H+ + OH- ---> H2O |
Which ion causes a solution to be pH 3? | the solution is acidic; the ion that causes solutions to be acidic is H+ |
When collecting pure dry crystals of Copper Sulphate from Sulfuric acid and Copper Oxide, why do you need to warm up the Sulfuric acid? | to speed up the reaction |
When collecting pure dry crystals of Copper Sulphate from Sulfuric acid and Copper Oxide, why is Copper Oxide until no more dissolve? | to ensure that copper oxide is IN EXCESS; to ensure that all the Sulfuric acid has reacted |
When collecting pure dry crystals of Copper Sulphate from Sulfuric acid and Copper Oxide, why do you need to filter the Copper Oxide | to remove the EXCESS of copper oxide |
How would the pH change when Copper Oxide is added to Sulfuric acid? | the pH would go from 1 to 7 because the acid would be slowly neutralised; it would not go up further because Copper oxide does not dissolve in water |
(HIGHER) What is a weak acid? Give an example | an acid that is partially dissociate: Ethanoic Acid dissociates only partly into Ethanoate ions and Hydrogen ions |
(HIGHER) What is a strong acid? Give an example | an acid that is completely dissociated: Sulfuric Acid dissociates only partly into Sulfate ions and Hydrogen ions |
(HIGHER) What happens to the pH when you dilute a solution of a strong acid 10 times? | The pH will increase by 1 unit |
Which salts are always soluble? | SNAP: sodium, nitrate, ammonium, potassium |
Which salts are always insoluble, and used as chemical tests in precipitation reactions | Barium Sulfate and Silver Chloride |