1
Q
femto (f)
A
x10^-15
2
Q
atto (a)
A
x10^-18
3
Q
mega (M)
A
x10^6
4
Q
giga (G)
A
x10^9
5
Q
tera (T)
A
x10^12
6
Q
peta (P)
A
x10^15
7
Q
exa (E)
A
x10^18
8
Q
centi (c)
A
x10^-2
9
Q
deci (d)
A
x10^-1
10
Q
deca (da)
A
x10^1
11
Q
hecto (h)
A
x10^2
12
Q
formula for conc, using mass - give units
A
c=m/v
g dm-3
13
Q
formula for conc, using moles - give units
A
c=n/v
mol dm-3 (M)
14
Q
avogadros constant
A
6.02x10^23
15
Q
formula for moles
A
n=m/Mr
16
Q
sub formula for moles into conc formula
A
c=m/(V*Mr)
17
Q
%(m/m)
A
- mass of solute (g) per 100g solution
- (mass solute(g))/(mass solution(g)) *100
18
Q
%(v/v)
A
- volume solute (ml) per 100ml solution
- (vol solute(ml))/(vol solution(ml)) *100
19
Q
%(m/v)
A
- mass of solute (g) per 100ml solution
- (mass solute(g))/(vol solution(ml)) *100
20
Q
rearrange concentration formula to determine mass of solute required for a given conc
A
m = Mr x C x V
21
Q
tenfold dilution
A
- dilution factor 10
- 1 in 10 dilution
- 1 part solute, 9 parts solution
22
Q
1:10 dilution
A
- 1in 11 dilution
- 1 part solute, 10 parts solution
23
Q
formula to find diluted concentration
A
C2 = (C1*V1)/V2
- 1: initial conc and vol
- 2: final (diluted) conc and vol
24
Q
accuracy
A
how close a measurement is to its target value
25
precision
how consistent results are regardless of their proximity to actual/target value
26
log addition law
logA + logB = log AB
27
log subtraction law
logA - logB = logA/B
28
log power law
logA^n = nlogA
29
what does Y=log10(X) mean
X=10^Y
30
variable
quantities that can take different values
31
constants
quantities that are ALWAYS fixed
32
parameters
fixed variables in particular situations
33
general form of a geometric sequence
n = a^r
34
exponential growth/ decay general formula
Xt = X0a^t
a>1 = growth
a<1=decay
35
dilution factor
the number of parts in the final diluted solution
36
1mmHg in Pa
133.3Pa
37
units for molecular mass
g mol-1 = Da (Daltons)
Year 1 - Lab
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