CPH Titration

Question 1

CPH How many samples do you receive? What are the volumes?

Answer 1

2 titration codeine (less then 85 ml so that you have enough for rinses ) and 1 phosphoric (more than 100 Mls so that you have enough for the 1L phosphoric titration prep)

Question 2

CPH Before the sample comes in 3 things ()

Answer 2

Clean your glassware, clean and rinse 25 Mls burette with plant ethanol, calibrate your pH low end)

Question 3

CPH when the sample comes in codeine tritration what info must the label have?

Answer 3

Titration volume, temperature

Question 4

CPH what to do with PA? Steps

Answer 4

Tare 100 mls flask, add PA with dry funnel. Record tare and gross weight.

Transfer this to the 1L flask, triple rinse flask and funnel. Use maybe another funnel.

Question 5

CPH julia detail abut sample temp

Answer 5

In the spec it says wait for it to cool, but people usually just go

Question 6

CPH codeine sample steps

Answer 6

Transfer sample form jar to cylinder, get all crystals out, use the ethanol form burette to rinse 1 or 2 maybe more depending on how much sample remains in the jar

Remember tp rinse the jar some times

Question 7

CPH important fact to remember about rinsing codeine jar

Answer 7

Never go above 100mls

Question 8

CPH important things about burette here

Answer 8

Always record every volume on a post it first just in case before moving on

Question 9

CPH burette and cylinder decimal places

Answer 9

Cylinder 1 decimal burettes 2?

Question 10

CPH actual sample calculation

Answer 10

Cylinder - burette

Question 11

CPH after your done with cylinder , what next

Answer 11

Transfer to 400 ml beaker rinse with water and ethanol and then fill to about 200 (this is just so tha the electrode pH can reach)

Titration with PA (you can go fast with about 30 MLS)

Question 12

CPH Basically the plant ethanol is just to (difference between two titrations)

Answer 12

Plant ethanol to rinse, the PA is used to actually titrate your sample