Which of the four substances listed will dissolve in water and why?

Chemistry

1 answer:

Orlov [11]3 years ago

7 0

Answer:

Sugar, sodium chloride, and hydrophilic proteins are all substances that dissolve in water. Oils, fats, and certain organic solvents do not dissolve in water because they are hydrophobic.

And, water is called the "universal solvent" because it dissolves more substances than any other liquid. ... Water molecules have a polar arrangement of the oxygen and hydrogen atoms—one side (hydrogen) has a positive electrical charge and the other side (oxygen) had a negative charge.

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First, we should get moles acetic acid = molarity * volume

=0.3 M * 0.5 L

= 0.15 mol

then, we should get moles acetate = molarity * volume

= 0.2 M * 0.5L

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then, we have to get moles of OH- which added:

moles OH- = molarity * volume

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= 0.02 mol

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PH = Pka + ㏒[salt/acid]

when we have Ka = 1.8 x 10^-5

∴Pka = -㏒Ka

= -㏒ 1.8 x 10^-5

= 4.7

So by substitution:

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