Formula🤐👽

Question 1

PH formula

Answer 1

PH HAVE NO UNIT
OH and H3O+ HAVE UNIT WHICH IS M(molarity)

*PH + POH = 14
*PH = POH
*Pkw= -log kw(power of)

• PH for hydrogen ion(H+ or H3O+)
  PH = -log[H+]
  [H+]= 10-PH(power of)

*PH for hydroxide ion(OH-)
PH= -log[OH-]
OH- = 10-PH(power of)

Question 2

Dissociation formula

Answer 2

-> (Separate or dissociate)

->
<- (Partially dissociate/ and also react to produce)

Question 3

Equilibrium constant of water

Answer 3

kw(of water) = [H3O+][OH-]

*unit: M

Question 4

Direct or serial dilution

Answer 4

Direct dilution:

Question 5

KF water content calculation

Answer 5

%H2O = a* WE / 10*e

a=reagent in (ml)
WE= (mgH2O/ml)
e=sample in (g)
unit= % or mg/ml

Change to {mg} if what to find {WE}
Remain as {g} if finding %H2O

Question 6

To find density of liquid or solid

Answer 6

Solid
P= mass of solid (mg) / vol of solid (m3)

Liquid
P(density) = mass of liquid/vol of liquid

Question 7

Density of irregular solid

Answer 7

(Mass of container + water + mass of irregular solid) - (mass of container + water) = {mass of irregular solid}

(Vol of liquid + irregular solid) - ( vol of liquid) = {vol irregular solid}

** Density of irregular solid:

(Mass of irregular solid)/(vol of irregular solid)

Unit: g/ml or g/cm3

Question 8

Soil density calculation

Answer 8

(Mass of dry soil) - (mass of rock) / (vol of dry soil) - (vol of rocks) = density(g/ml)

Question 9

Tap density

Answer 9

Mass of sample(g) / vol of tapped sample(ml) = density (g/ml)

Question 10

Special gravity

Answer 10

SG= density of sample/density of water
* NO UNIT

Question 11

Viscosity formula

Answer 11

Viscosity = dial reading(%) times factor

Question 12

Unit for viscosity

Answer 12

Pa.s

10P = 1 Pa.s
1cP= 0.01P
1cP= 1mPa.s

Question 13

Water content

Answer 13

Water content = weight of water loss/weight of sample(before drying) times 100%

Question 14

% ASH(dry basis)

Answer 14

M ash/m dry times 100%

Question 15

% ASH(wet)

Answer 15

M ash/M wet times 100%