Chemistry Answers

Beaker

1

2

3

4

5

6

Sample Volume (mL)

1000

1000

1000

1000

1000

1000

Coagulant

(ppm)

12

14

16

18

20

22

SG of Coagulant: 1.22

Calculate what is the dosage in ml for 12ppm, 14ppm, 16ppm, 18ppm, 20ppm, 22ppm in the attached table for Jar Test purpose?

b. What weight of limestone should be taken so that 1/20 the number of milligrams of CaSO4 obtained will represent the percentage of CaO in the mineral?

What volume (in L) of 0.246 M HNO3 solution is required to react completely with 38.6 mL of 0.0515 M Ba(OH)2?Ba(OH)2 + 2HNO3 → Ba(NO3)2 + 2H2O

Illustrate the phase diagram of a substance given with the following points: a triple point at 0.70 atm and 80 ºC; a normal freezing point at 100 ºC; a normal boiling point at 350 ºC; and a critical point at 1.6 atm and 810 ºC. For this,

complete the following:

1. Roughly sketch the phase diagram, using units of atmosphere and degree

Celsius. Label the area 1, 2, and 3, and points T and C on the diagram.

2. Describe what one would see at pressures and temperatures above 1.25 atm and 300 ºC.

3. Describe the phase changes from 100 ºC to 200 ºC at 1.5 atm.

4. What exists in a system that is at 1 atm and 100 ºC?

5. What exists in a system that is at 1 atm and 325 ºC?

Calculate the formula mass of caso4. what is the molarity of caso4 in a solution containing 1.2 gram of cso4 in a volume of 50 ml how many grams of caso4 are in 50 ml of 0.086 m caso4?

What is the molarity of 0.650L of solution containing 63g of Nacl

A solution of salt water raised the boiling point of water from 100°C to 102.5°C. What is the molality of the solution? Assume the kb of water is 0.51°C/m.

Camphor (C10H16O) has a molal freezing point depression constant of 5.95°C/m. If you dissolve 10.0 g of dimethyl ether (C2H6O) into 3.00 kg of camphor, what will be the change in the freezing point of camphor?

Name the following alkane. Show / explain how you name it.

Ch3—Ch—ch3 | Ch3—ch—ch2— l Ch3

Calculate the boiling point of a solution made from 227 g of MgCl2 dissolved in 700. g of water. What is the boiling point of the solution? Kb = 0.512° C/m.