Which of the following will expect to dissolve in water?

Question

Which of the following compounds or elements which would you expect to dissolve in water.
Note: you can select more than one answer
1. glucose (C6H12O6)
2. paraffin wax (approximate formula C30H62)
3. sodium sulfate
4. iodine (I2)

Answer 1

1) and 3) are very soluble in water.

Answer 2

the key principle is like dissolves like (in terms of polarity):

1. glucose (C6H12O6)- it will dissolve, forming a colorless solution
2. paraffin wax (approximate formula C30H62)- purely nonpolar, will not dissolve to polar water
3. sodium sulfate- it will dissolve, furthermore it will ionize in water into 2 Na + SO4
4. iodine (I2) - the poles of H2O will result in spontaneous slight polarization of the I2, a dipole induced interaction, it will slightly dissolve forming a light orange solution

Answer 3

1. glucose (C6H12O6)- yes this will dissolve
2. paraffin wax (approximate formula C30H62)-insoluble
3. sodium sulfate-soluble
4. iodine (I2) slightly soluble.

Answer 4

#1 3 & 4

Answer 5

1) glucose yes (see honey is soluble in water)

2) hydrophobic substance, not polar, insoluble in water

3) Strong salt very soluble in water

4) slightly soluble in water though it is an halogen but big atom does not caich easily an electon to give I-

Answer 6

I thought it was just the ion 3. The others have covalent bonds that can't be separated by water's hydrogen bonds.

Answer 7

Only 1, glucose.

Answer 8

3: Sodium sulfate, it will dissolve in water because it is polar

Answer 9

1. yes
2. no
3. yes
4. yes

Answer 10

1.yes
2.no
3.yes
4.(yes)