introduction lecture

Question 1

Qualitative analysis

Answer 1

identification of elements , species and compounds in a sample

Question 2

quantitative analysis

Answer 2

determination of absolute or relative amounts of analyte present in the sample

Question 3

What’s an element

Answer 3

Chemically the simplest substance that cannot be broken down using chemical processes

Question 4

What’s an atom

Answer 4

smallest part of an element - contains a dense nucleus of protons and neutrons surrounded by moving electrons

Question 5

What’s a molecule

Answer 5

fundamental unit forming a chemical compound

Question 6

What’s a compound

Answer 6

substance composed of 2 different atoms that have reacted chemically with eachother

Question 7

What’s an analyte

Answer 7

substance or compound of interest measured analytically

Question 8

Matrix

Answer 8

components within a mixture that provides support and structure

Question 9

What does analytical techniques depend on

Answer 9

nature of sample
conc of analyte expected
accuracy

Question 10

Concentration

Answer 10

How much of a substance is contained within a specified volume or mass

Question 11

what does ppm stand for

Answer 11

parts per million

Question 12

1ppm = how many grams

Answer 12

1g in a 1,000,000g

Question 13

how many mg are in 1kg

Answer 13

1mg

Question 14

How many micro grams in a gram

Answer 14

1ug

Question 15

Molarity

Answer 15

number of moles of solute per litre of solution

Question 16

Equation for molarity

Answer 16

C=n/v

Question 17

Avogadros constant

Answer 17

6.022x10^23