Topic three- Chemistry

greenchloe1998
Mind Map by greenchloe1998, updated more than 1 year ago
greenchloe1998
Created by greenchloe1998 about 5 years ago
22
1

Description

I don't understand all of this, so i'm trying to understand it.... meh..

Resource summary

Topic three- Chemistry
1 Flame tests.
1.1 potassium ---> purple
1.2 lithium ----> pinky red
1.3 Calcium ----> orangey-red
1.4 sodium ----> yellowy - orange
1.5 Barium -----> green
1.6 Flame tests are used to find out cation metals.
1.6.1 pawwwsitive ( positive ions)
2 Precipitation reactions
2.1 precipitation reactions are used to find out anions.
2.1.1 negative ions
2.2 precipitation reactions can also be used to test for cations
2.2.1 Aluminium (3+) and Calcium (2+) create a white precipitate.
2.2.2 copper (2+) precipitates out blue
2.2.3 iron (2+) creates a green precipitate
2.2.3.1 Iron ( 3+) creates a brown precipitate
2.2.4 To test these transition metals we added sodium hydroxide
3 TITRATIONS
3.1 A strong acid added to a strong alkali = a base and a salt. But ONLY if it's in the right quantities.
3.2 1) fill the BURETTE with HCL solution to exactly zero. Use the tap to pour some out if it's not exact.
3.2.1 2) Fill the beaker underneath the burette with 25cm cubed of NaOH.
3.2.1.1 Put two drops of phenolphthalein indicator into the beaker.
3.2.1.1.1 Let the HCL into the beaker until the colour makes a slight change and then turn the tap one turn at a time.
3.2.1.1.1.1 Make sure you're swirling the beaker all the time and when the product turns colourless stop letting the HCL out.
3.2.1.1.1.1.1 wash the conical flask with dilute water and the acid that you're using and refill it with alkali and the indicator.
3.2.1.1.1.1.1.1 redo the experiment and record the results on the table.
3.2.1.2 place a while tile under the beaker
4 Calculating moles
4.1 mass = moles * formula or atomic mass
4.2 moles = volume * concentration
4.2.1 Step 1) write the known information
4.2.1.1 what's the concentration, the volume etc.?
4.2.2 Step 2) write out the balanced equations
4.2.3 Step 3) Calculate the moles
4.2.3.1 concentration = moles * volume
4.2.4 divide cm by 1000 to create dm

Annotations:

  • dont actually understand this :S
5 Hard water
5.1 permanent
5.1.1 contains calcium hydrogen carbonate ions and magnesium hydrogen carbonate ions
5.1.2 ion exchange resin columns
5.1.2.1 The resin is coated in sodium ions, which have a positive charge. The magnesium and calcium have a stronger positive charge and so displace the sodium ions. The sodium ions dissolve into the water- this hard water is softened using this method.
5.1.3 washing powder
5.1.3.1 creates a scum and removes the calcium and magnesium ions.
5.2 temporary
5.2.1 can be boiled to soften. Creates CaCo3 (s) which is limescale.
Show full summary Hide full summary

Similar

Chemistry 3 Extracting Metals Core GCSE
Chloe Roberts
BELIEVING IN GOD- UNIT 1, SECTION 1- RELIGIOUS STUDIES GCSE EDEXCEL
Khadijah Mohammed
Unit 1: Business Studies GCSE
Libby Rose
MATTERS OF LIFE AND DEATH - UNIT 1, SECTION 2 - RELIGIOUS STUDIES GCSE EDEXCEL
Khadijah Mohammed
Key Terms - Religion and community cohesion
jackson.r08
GROUPED DATA FREQUENCY TABLES: MODAL CLASS AND ESTIMATE OF MEAN
Elliot O'Leary
Fossils and evolution (edexcel)
10ia3416
And the Glory of the Lord- Handel
celeste-sykes
MARRIAGE AND THE FAMILY - UNIT 1, SECTION 3 - RELIGIOUS STUDIES GCSE EDEXCEL
Khadijah Mohammed
Religious Studies Key Quotes
darktwilight221