How will the osmotic pressure of an aqueous solution change as evaporation occurs?

When evaporation occurs, the osmotic pressure increases.

Explanation:

Osmotic pressure is defined as the minimum excess pressure that can be applied on the solution to prevent the entry of the solvent into the solution through a semipermeable membrane. The formula to calculate osmotic pressure is given by the equation:

where,

= osmotic pressure

c = concentration of solute

R = gas constant

T = temperature

As, concentration of solute is directly proportional to the osmotic pressure. So, when concentration increases, osmotic pressure also increases and vice-versa.

Evaporation is a process when liquid changes its state to gaseous state by increasing the temperature. In this process, solvent particles escape and more and more solute particles remain in the solution. So, concentration of solute particles increases.

Hence, evaporation causes increase in the osmotic pressure.

the correct name for the n3 ion is azide. azide is a polyatomic anion with a -1 charge and is written as n3 -1. it consists of three nitrogen atoms bonded together. hope i . let me know if you need anything else.

1. the question asks the most appropriate, which seems to rule out "all of the above." your choice appears to be the correct one.

2. the protocol described is good for identifying correlation, but not cause and effect. for cause/effect, you need to devise a protocol that will assign the treatment (or not) to groups that have essentially the same "demographics" with respect to all the other variables. your choice regarding control group seems appropriate. random assignment of treatment (choice d) may be appropriate also. (i think you can argue that b and d are just different descriptions of the same method.)

3. d will randomize the birds, but may not guarantee there are 10 in each group. e will do both, so seems the better choice.

comment on question 2

based on the problem statement, it seems clear that confident, attentive drivers are more likely to use daytime running lights. so, the protocol might need to be devised in such a way that the lights would be turned on or off without the driver's knowledge. (an attentive driver will figure it out.) assigning a confident, attentive driver to a group required to drive without running lights might mess with his/her confidence and attentiveness. you don't want your experiment to do that. (nor do you want the experiment to subject a driver to greater risk of accident as a consequence of driving without running lights.) experiments involving human safety are always problematic.