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Chapter 4: Q82E (page 224)

Potatoes can be peeled commercially by soaking them in a 3-M to 6-M solution of sodium hydroxide, then removing the loosened skins by spraying them with water. Does a sodium hydroxide solution have a suitable concentration if titration of 12.00 mL of the solution requires 30.6 mL of 1.65 M HCI to reach the end point?

Short Answer

Expert verified

4.21 M NaOH solution is required

Yes, Potatoes can be peeled commercially by soaking them in 3M to 6M solution of NaOH because 4.21 M value is between 3 M to 6M.

Step by step solution

01

Given Data

Ma Va = Mb Vb

a = acid = HCl and b = base = NaOH

Va=Volume of acid = 30.6 mL

Ma=Molarity of acid = 1.65 M

Vb=Volume of base = 12 mL

Mb=Molarity of base = ?

02

Determine the concentration

\(\begin{aligned}{}{M_a}{V_a} &= {M_b}{V_b}\\1.65M \times 30.6mL& = {M_b} \times 12mL\\{M_b}& = 4.21\end{aligned}\)

Therefore, the required concentration of NaOH=4.21 M

4.21 M is between 3 M to 6 M solution in which potatoes are soaked.

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