Question

vinegar contains 5g of acetic in 100mL of solution so the (w/v)% concentration is:

Answer 1

The (w/v)% concentration of vinegar contains 5g of acetic in 100mL of solution is approx 0.5 %

What is Concentration ?

The concentration of a chemical substance expresses the amount of a substance present in a mixture.

There are many different ways to express concentration.(w/v)% is one of them.

Given ;

• Mass of solute(acetic acid) is 5.0 g
• Volume of solution is 100.0 mL.

We need to convert the grams of acetic acid to moles ;

Formula of acetic acid is CH₃COOH

Thus,

Molar mass of acetic acid = 2(12.01) + 4(1.01) + 2(16)  

                                           = 24.02 + 4.04 + 32

                                           = 60.06 grams per mol

Moles of acetic acid = 5.0/60.06

                                 

                                 = 0.083 moles

(w/v)% = 0.083 x 60 / 1000 x 100

          = 0.498 %

          = 0.5 %

Hence, The (w/v)% concentration of vinegar contains 5g of acetic in 100mL of solution is approx 0.5 %

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