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
Combined Science
Chemistry Paper 2
| Question | Answer |
|---|---|
| Name of Group 1? | Alkali Metals |
| Group 1 reaction trend? | More reactive as you go down as outer electron is further from the nucleus so smaller force of attraction |
| Name of Group 7? | Halogens |
| Group 7 reactivity trend? | Get less reactive as you go down and boiling point increases |
| Group 0 name? | Noble gases |
| Group 0 reactivity? | Very unreactive as full outer shell |
| Describe the precipitate practical to determine rate of reaction | HCl and sodium thiosulphate in beaker over paper with cross drawn on it, stop timer when cross is no longer visible |
| How does temperature affect this? | Higher temperatures mean faster rate of reactions |
| How do we measure volume of gas produced? | Adding gas syringe to reaction vessel |
| How do we increase the rate of reactions of solutions? | Increase concentration |
| How do we increase the rate of reactions of gas reactants? | Increase pressure |
| How do we increase the rate of reactions of solid reactants and give example? | Increasing surface area (Crushing them) |
| Why do these things all have this affect? | Particles collide more frequently |
| What does increasing temperature do? | Particles move faster and collide more frequently and with more energy |
| How does a catalyst increase rate of reaction? | Reduces activation energy so collisions are more likely to be successful |
| Whats an exothermic reaction? | A reaction that gets hot |
| Whats an endothermic reaction? | A reaction that gets cold |
| Describe practical with acid and alkali and temperature. | Neutralisation reaction with acid and alkali in polystyrene cup, measure temp with thermometer, measure max temp and repeat with increase volume of alkali used |
| What does crude oil consist of? | Hydrocarbons |
| 2 types of hydrocarbons? | Alkanes and Alkenes |
| What do alkanes consist of? | Carbon atoms surrounded by bonded hydrogen atoms |
| If we had 2 carbon atoms, how many hydrogens would we have? | 6 (Times by 2 and add 2) |
| What do Alkanes end in? | Ane |
| From 1 to 6 in a carbon chain without 5 give each prefix | Meth, Eth, Prop, But, Hex |
| How do we use fractional distillation for alkanes in crude oil? | Heat, they rise, recondense at different heights |
| Why do longer alkanes have higher boiling points? | More energy needed to overcome the stronger intermolecular forces |
| Give the order of real life examples of the highest fractional distillation to the lowest. (6) | LPG, Petrol, Kerosene, Diesel Oil, Heavy fuel oil, bitumen |
| What is an Alkene? | A hydrocarbon with at least one double covalent bond |
| If I had C=C in the centre, what would the number of H be? | 4 |
| Give the equation for complete combustion | Fuel + oxygen → Carbon dioxide + water |
| Give the equation for incomplete combustion | Fuel + oxygen → Carbon monoxide/carbon + water |
| What do alkenes do to bromine water? | Turn it from orange to colourless |
| What do we use cracking for? | Break longer alkanes into shorter alkanes + an alkene |
| What does catalytic cracking use? | A Zeolite catalyist at 550c |
| What does steam cracking use? | No catalyst and higher temp of >800c |
| What was the earth's early atmostphere mostly made of? | CO2 |
| What is the greenhouse effect? | What keeps the earth warm |
| What is carbon footprint? | The release of CO2 into the atmosphere as a result of your actions |
| What does carbon monoxide do to the blood? | Binds to haemoglobin reducing oxygen they are able to transport |
| What does sulphur dioxide cause? | Acid rain |
| What does acid rain do? | Corrodes metals and errodes stone |
| What do nitrogen oxides do? | Cause respiratory problems |
| What does soot cause? | Health issues |
| Test for hydrogen? | Lit splint produces squeaky pop |
| Test for oxygen? | Will relight glowing splint |
| Test for Carbon dioxide? | Limewater goes cloudy |
| Test for chlorine? | Bleaches blue litmus paper |
| Graph for exothermic reaction? | Reactants straight line high dotted at end labelled activation energy, products straight line low |
| Graph for endothermic reaction? | Opposite heights |
Created by:
user-1956972