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Rudik [331]
3 years ago
12

4. Each time that you prepare a diluted bleach solution you will want it to have a [OH-] = 0.02. Calculate how much 1.00 M NaOH

you need to add to d.1. water to get every 20 mL of this concentration of OH- ion. Express your answer in drops of 1.00 M NaOH. (Assume that there are 20 drops in 1 m.)
Chemistry
1 answer:
bezimeni [28]3 years ago
6 0

Answer:

8 drops of 1.00 M NaOH will be needed.

Explanation:

Concentration of [OH^-] in bleach solution = 0.02 M

NaOH\rightarrow OH^-+Na^+

NaOH=[OH^-]=0.02M

Concentration of bleach solution we want ,M_1 = 0.02 M

Volume of the bleach solution,V_1 = 20 ml

Concentration of NaOH solution,M_2 = 1.00 M

Volume of the NaOH solution required ,V_2 = ?

M_1V_1=M_2V_2

0.02 M\times 20 mL=1.00 M\times V_2

V_2=\frac{0.02 M\times 20 mL}{1.00 M}=0.4 mL

1 mL = 20 drops

0.4 mL = 0.4 × 20 drops = 8 drops

8 drops of 1.00 M NaOH will be needed.

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