1. what happens to the solubility of an ionic compound as the ionic strength of the solution increases (up to ≈0.5 m≈0.5 m )?
a. solubility increases
b. solubility decreases
2. why is there a correlation between the solubility of an ionic compound and the ionic strength of the solution?
a. the increase in the ionic strength increases the ionic atmosphere around an individual ion, increasing the contact between ions, and increasing the tendency for ions to bind together.
b. the increase in the ionic strength increases the concentration of aqueous ion pairs.
c. the increase in the ionic strength decreases the concentration of aqueous ion pairs.
d. the increase in the ionic strength increases the ionic atmosphere around an individual ion, shielding it from other ions, and decreasing the tendency for ions to bind together.

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.

16

explanation:

the marks go by 4s

they are all solids.