Achemist wishes to decrease the vapor pressure of a large volume of water. which amount of solute will decrease it the most? (note: assume each sample of solute completely dissolves in the water.) a)0.10 mol al2(so4)3 b)0.10 mol sucrose c)0.40 mol glucose d)0.20 mol nacl

A) 0.10 mol

Explanation:

As the relative lowering of vapor pressure is directly proportional to the amount of dissolved solute.

The formula for relative lowering of vapor pressure will be,

where,

= relative lowering in vapor pressure

i = Van'T Hoff factor  

= mole fraction of solute

1. For 0.10 mol

, i= 5 as it is a electrolyte and dissociate to give 5 ions. and concentration of ions will be

2.  For 0.10 mol sucrose

, i= 1 as it is a non electrolyte and does not dissociate, concentration of ions will be

3. For 0.40 mol glucose

, i= 1 as it is a non electrolyte and does not dissociate,  concentration of ions will be

4. For 0.2

, i= 2 as it is a electrolyte and dissociate to give 2 ions, concentration of ions will be

Thus as concentration of solute is highest for , the vapor pressure will be lowest.

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i  

the answer is true. hope it .