Question

If 17.8 grams of KOH dissolve in enough water to make a 198-gram solution, what is the concentration in percent by mass?

8.25% KOH

8.99% KOH

10.9% KOH

11.1% KOH

Answer 1

10.9% KOH

Answer 2

Water is a polar solvent. Which of the following will not dissolve in water?

sugar

table salt

vinegar

olive oil

Answer 3

table salt

Answer 4

If 3.2 moles of NaCl are dissolved in enough water to make a 0.98-liter solution, what is the molarity of the solution?

0.31 M NaCl

0.77 M NaCl

1.3 M NaCl

3.3 M NaCl

Answer 5

1.3 M NaCl

Answer 6

Why is the ionic compound NaCl (table salt) able to dissolve in a glass of the molecular compound water (H2O)?

Both the solute and solvent contain ionic bonding, which makes them compatible.

The solute and solvent react together to form a new compound.

Ions from the solute have a strong attraction to the polar solvent molecules.

It does not require much energy to break the covalent bonds in the water molecules.

Answer 7

you help me i give you metels.

Answer 8

It does not require much energy to break the covalent bonds in the water molecules.

Answer 9

0k

Answer 10

If 33.6 grams of KCl are dissolved in 192 grams of water, what is the concentration of the solution in percent by mass?

21.2% KCl

17.5% KCl

14.9% KCl

5.71% KCl

Answer 11

17.5% KCl

Answer 12

Which of the following changes will increase the amount of solid solute able to be dissolved in a liter of liquid water?

decreasing pressure

increasing temperature

decreasing temperature

increasing surface area

Answer 13

decreasing pressure

Answer 14

Describe, in your own words, why granulated sugar will dissolve faster in a cup of coffee than sugar cubes. Be specific in your explanation.

Answer 15

i have this question and and one more you help me ill add u on fb and give you metels

Answer 16

DUE TO DESITY

Answer 17

*DENSITY

Answer 18

sugar cubes HAS less density so this happens

Answer 19

@pumpgirls got it

Answer 20

I would take some of the answers you have so far with a pinch of salt. If you divide the mass of KOH by the mass of the solution you will get a different answer. As for the salt dissolving in the water, the correct answer is the fact that the ions are strongly bound by the polar molecules of water. And the sugar cubes have a lesser surface area per unit weight compared with granules of sugar.

Answer 21

ok

Answer 22

got what?

Answer 23

One more thing - you can get more solute into solution by increasing the temperature of the solvent.

Answer 24

soty 2013 you gave me rong answer !!! i got a zero out of 25 points

Answer 25

Yeah all of his answers were wrong...

ebaxter was right! take soty's answer with a grain of NaCl (hehehe)

Answer 26

the second one was incorrect. Olive oil will not dissolve in water. Table salt and sugar will dissolve in water

Answer 27

the first one was wrong too