Page 285 - Chemistry eBook

sity
e Calculations cent Error
cent Composition
centration
bined Gas Law
ation
t
m d = V
% error = measured value – accepted value × 100 accepted value
% composition by mass = mass of part × 100 mass of whole
Table T
Important Formulas and Equations
d = density m = mass
V = volume
number of moles =
given mass
Parts Per Million
(Measuring Concentration)
gram-formula mass
Reffy, Table T (p. 12) shows the parts per million formula. Simply plug in the values to find your answer.
parts per million =
mass of solute
× 1000000
mass of solution
P1V1 T1
P2V2
3=. Formula: 0.05 V = volume
NaCl solution contains 0.05 g in 1000 g of solution.
molarity = moles of solute
How many parts per million are there?
liter of solution
1. Mass of solute: 0.05 g
2. Mass of solution:P1=00p0regssure
(
T2
Mass of solution = mass of solute ++mass of solvent) –
X 1,000,000 1000 T = temperature
= 50 parts per million
MAVA = MBVB q = mC∆T
q = mHf q = mHv
MA = molarity of H VA = volume of acid
MB = molarity of OH VB = volume of base
Hf = heat of fusion
K = °C + 273
K = kelvin
q = heat
m = mass
C = specific heat capacity
Hv = heat of vaporization ∆T = change in temperature
n
l
n
m
r
a
UNIT 7: SOLUTIONS / SOLUBILITY © 284
mperature