This problem has been solved! see the answerthe following solutions are prepared by dissolving the requisite amount of solute in water to obtain the desired concentrations. rank the solutions according to their respective osmotic pressures in decreasing order assuming the complete dissociation of ionic compounds. rank from highest to lowest osmotic pressure. to rank items as equivalent, overlap them.1m mgcl2, 1m kcl, 2m ch3ch2ch2oh, 1m c12h22o11

Explanation:

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

where,

= osmotic pressure of the solution =

i = Van't hoff factor =

c = concentration of solute =

R = Gas constant =

T = temperature of the solution = T

1) For 1 M :

i = 3

c = 1 M

2) For 1 M :

i = 2

c =  M

3) For 2 M :

i = 1 ( organic molecule)

c = 2 M

4) For 1 M :

i = 1 ( organic molecule)

c = 1 M

Osmotic pressures in decreasing order

1 M >1 M =2 M >1 M

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.