Chemical Analysis
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What are the 2 types of chemical analysis ?
Quantitative & Qualitative
What does chemical analysis allow chemists to do?
monitor the environment both qualitatively and quantitatively.
What does qualitative analysis tell us?
what is present. e.g. What gas is produced? How do we test it ?
What does quantitative analysis tell us?
how much of a chemical is present.
Give 3 examples of qualitative analysis?
Flame tests Precipitation Chromatography
Give 2 examples of quantitative analysis ?
Acid/base titrations Preceipitation
What can flame tests be used to identify?
metals present in a sample
What can precipitation find out?
what ions are present in a sample
What can chromatography be used to identify ?
A substance present in a mixture.
What can acid/base titrations be used to calculate?
the concentration of an acid or alkali
What can precipitation be weighed to find?
how much of an ion is present
What is a precipitation reaction?
when two soluble solutions react together to form an insoluble product.
What is the insoluble product called in a precipitation reaction?
precipitate
What is the word equation for the precipitation reaction between potassium iodide and lead (II) nitrate?
potassium iodide+ lead nitrate>lead iodide+potassium nirtate
What is the balanced equation for the precipitation reaction between potassium iodide and lead (II) nitrate?
2KI(aq)+Pb(NO3)2(aq)>PbI2(s)+2KNO3(aq)
What is the balanced ionic equation for the precipitation reaction between potassium iodide and lead (II) nitrate?
2K+I-(aq)+Pb+(NO3-)2(aq)>Pb+(I-)2(s)+2K+NO3-(aq)
What are the spectator ions for the precipitation reaction between potassium iodide and lead (II) nitrate?
K+ and NO3- (because they don’t change state - always aq)