Question

f solate are dissolved 30 30g nter to form a saturated an at 298 K. calculate the ity of the solate at this rature​

Answer 1

Explanation:

weight of salt = 90 gram, 

solubility  = 50

sing formula 

solubility of solute =weightofsolventinsaturatedsolutionweightofsoluteinsaturatedsolution×100

or 50=weightofsolventinsaturatedsolutio90gm×100

so weight of solvent in saturated solution = 5090gm×100=180gm

Hence 180 gm of water is required to prepare a saturated solution.

Benzene and I2I2 are both nonpolar molecules. The only possible attractive forces are London dispersion forces.

Aniline is a polar molecule with a dipole moment of 1.6 D and has an –NH2–NH2 group that can act as a hydrogen bond donor. Dichloromethane is also polar with a 1.5 D dipole moment, but it has no obvious hydrogen bond acceptor. Therefore, the most important interactions between aniline and CH2Cl2CH2Cl2 are likely to be dipole-dipole interactions.

Water is a highly polar molecule that engages in extensive hydrogen bonding, whereas I2I2 is a nonpolar molecule that cannot act as a hydrogen bond donor or acceptor. The slight solubility of I2I2 in water (1.3×10−3mol/L1.3×10−3mol/L at 25°C) is due to London dispersion forces.

Arginine is a highly polar molecule with two positively charged groups and one negatively charged group, all of which can form hydrogen bonds with water. As a result, it is hydrophilic and required in our daily diet.

Although pantothenic acid contains a hydrophobic hydrocarbon portion, it also contains several polar functional groups (–OH–OH and –CO2H–CO2H) that should interact strongly with water. It is therefore likely to be water soluble and required in the diet. (In fact, pantothenic acid is almost always a component of multiple-vitamin tablets.)

Oleic acid is a hydrophobic molecule with a single polar group at one end. It should be fat soluble and not required daily.