ch. 2 bpc class

1

Chapter 2 Moles, Density and Concentration

Basic Principles and Calculations in Chemical Engineering

2



3



List of elements and their atomic weight

4



5



From the table MW of Na=22.9897; O=15.9994; and H 1.0079 Ib / Ib mol or g/ g mol

Then the MW of NaOH is 40 Ib/Ib mol or g/g mol

6



7



8



9



The reference substance is nearly always water for liquids or air for gases.

If a substance's specific density is less than one then it is less dense than the reference; if greater than 1 then it is denser than the reference.The density of water is 1 g/cm3, 1000 kg/m3, or 62.43 Ib/ft3 at 4 oC.

10



3

3

ft

water Ib1

ft

glycerol Ib184.1

3

3

ft

solution Ib 9.73ft

water Ib62.4

11



O2

solution.H

GrSp

solution v

drug m

solu kg

drug kg

Using density to find concentration

Convert volume to mass by flow rate x concentrationThen divide mass by MW to get kg mol

12



13



14



15



16



17



18



19



20



Solution

21



Solution

To find ratios of atoms, divide every mole number of each component by the smallest mole number to obtain :1 O : 1.09 C : 2 H

22



Solution

OH

OGrSp2

2Ag.

23



Solution

Proof 97 of rum is %48.5 alcohol3cm /g 0.898 0.515(1) 1)0.485(0.79 Rum of

The density of the rum is less than the density of ice, this makes the ice to sink in the rum

Solution

24



Solution

25



Solution

26



Solution

27



Solution

28



Solution

Solution

29



Solution

30



Solution

Solve problems 9, 10, 11, 12, 13, 14, 15, 16. 17, 21, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 37, 38, 39, 40, 41, 43, 44, 45, 46, 47, 48, 49, 50, 52 and 53

ch. 2 bpc class

Documents