Answer : The volume of water needed to recrystallize 0.900 g of benzoic acid is 13.24 mL.
Explanation :
For the complete recrystalization, the amount of hot water should be such that, the benzoic acid is completely soluble in it.
As we are given that the solubility of benzoic acid in hot water is 68.0 g/L. Now we have to determine the volume of water is needed to recrystallize 0.900 g of benzoic acid.
From this we conclude that,
As, 68.0 grams of benzoic acid soluble in 1 L of water.
So, 0.900 grams of benzoic acid soluble in of water.
The volume of water needed = 0.01324 L = 13.24 mL
conversion used : (1 L = 1000 mL)
Therefore, the volume of water needed to recrystallize 0.900 g of benzoic acid is 13.24 mL.
Polar covalent bonds (because hydrogen and oxygen form polar bonds and are both nonmetals so it's covalent) and hydrogen bonds (because the water molecules are attracted to each other with partial charges, causing specific properties like surface tension).
So in my very bad drawing that I attached in case you're more a visual learner, the d- and d+ show the partial charges of hydrogen and oxygen (making it polar, as the electrons in the bond are more shifted towards oxygen, which is why oxygen has a negative sign) and the yellow dotted line show the hydrogen bonds.
The temperature where a liquid turns into vapor
V1 / T1 = V2 / T2
3.5 / 20 = 3 / T2
T2 = 17.1 C