General Flashcards
1
Q
Hazard
A
the ability of a substance or biological agent to cause harm
2
Q
Risk
A
the likelihood that a substance or biological agent might be harmful under specific circumstances
3
Q
Units
A
- 1l = 1000ml = 1000000 μl
- 1M = 1000mM = 1000000 μM
- 1g = 1000mg = 1000000 μg
- 1ml = 1g
4
Q
Pipettes
A
- P1000 = 100-1000 μl
- P200 = 20 - 200 μl
- P20 = 2-20 μl
5
Q
Formulas
A
- Concentration (M) = moles/ volume (L)
- Dilution: c1 x v1 = c2 x v2 = c3 x v3
- Yield = Actual/theoretical
6
Q
Errors
A
• Systematic: due to equipment, procedural and human error
• Random: factors beyond your control
• Accuracy vs precision
o Accuracy – how close something is to the actual value
o Precision – how close something is to the other values measured
7
Q
Graphs
A
- Nature is rarely a linear progression
* y=10x and x = log10y
