analytical chemistry

Question 1

in qualtative analysis what is the analyte

Answer 1

Chemical Species that is being analysed.

Question 2

what then is the matrix?

Answer 2

Matrix: Everything else in the sample that contains the analyte

Question 3

what is the concentration tequinique?

Answer 3

SSA = Signal (or instrument response)= ka ca

Question 4

interferant-

Answer 4

Interferent: Chemical Species that changes the signal and hence
causes errors or biases.

Question 5

for kai= ki/ka

Answer 5

If Kai is greater than 1, then it responds highly to the interference and thus has poor selectivity

Question 6

what are standards-

Answer 6

Ensures that the equipment or instrument used to measure the signal works
correctly – Use of a standard sample to produce an exact signal.- known concentration.

Question 7

what is a calibration curve?

Answer 7

signal vs concetration

Question 8

what are the figures of merit?

Answer 8

Accuracy
* Precision
* Sensitivity
* Selectivity
* Robustness & Ruggedness
* Scale
* Time
* Cost

Question 9

what is the ph of the oceans?

Answer 9

8.1 (alkinine ) basic

Question 10

why is the oceans basic?- 8,1

Answer 10

Rock weathering… often silicates on land and in rivers chemically
weather to form bicarbonate and this washes into the seas and oceans