Add Sodium Hydroxide, the ammonium gas will turn damp red litmus paper blue
4 of 28
How would you carry out a flame test?
Use a wire to place a sample of solution into a bunsen burner flame
5 of 28
What is the flame colour for Potassium?
Lilac
6 of 28
What produces a brick red flame?
Calcium
7 of 28
What is the flame colour for sodium?
Yellow
8 of 28
What would produce a green/blue flame?
Copper
9 of 28
What is atomic spectroscopy?
The process by which the amount of specific atoms in a sample can be identified, using the colour to match with specific frequencies
10 of 28
Are transition metal hyrdoxides soluble in water?
No
11 of 28
How might you identify transition metal?
Add sodium hydroxide to displace the transition metal, producing a transition metal hydroxide and a precipitate
12 of 28
How would you identify Iron 3
A rust coloured precipitate
13 of 28
What produces a green precipitate (which oxidises to red) when sodium hydroxide is added?
Iron 2+
14 of 28
What colour precipitate would copper produce after reacting with Sodium Hydroxide?
Green/ blue
15 of 28
What is test for a halide?
Add silver nitrate to produce a precipitate
16 of 28
What produces a cream precipitate?
A Bromide
17 of 28
What colour precipitate does chloride produce?
White
18 of 28
What gives a yellow precipitate after the addition of silver nitrate?
An iodide
19 of 28
What can be done to test for halide ions, and what are the results?
Add dilute nitric acid (for impurity removal) , add silver nitrate (to form precipititates) the colours are as before
20 of 28
What is the identifying feature of adding a carbonate to an acid?
Fizzing from carbon dioxide which can be tested for with limewater
21 of 28
How can a sulfate be identified?
Add barium chloride and a white precipitate is formed
22 of 28
How can an alcohol be identified?
Oxidised alcohols go from orange to green- turn orange dychromate crystals green OR infrared screening
23 of 28
How might one test for an alkene?
Add orange Bromine water (the double bond becomes saturated and breaks) goes clear
24 of 28
How might one test for a carboxylic acid?
Add sodium carbonate to produce bubbles (effervenscence) of carbon dioxide which can be tested with limewater
25 of 28
How does infrared spectroscopy work?
It identifies certain bonds in organic molecules, makes the bonds vibrate and the different bonds can be identified as they vibrate at different frequencies.
26 of 28
What can infrared spectroscopy do?
Check for successful reactions and identify the functional groups in a molecule
27 of 28
How can infrared be used?
Drug development industry, medicine and product development by quick, simple and accurate method which can replace the need for chemical tests.
Comments
No comments have yet been made