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ValentinkaMS [17]
3 years ago
7

How many grams of NaOH are needed to make 500 mL of a 2.5 M NaOH solution

Chemistry
1 answer:
Veronika [31]3 years ago
4 0
The number of grams  of NaOH  that are needed to make 500 ml of 2.5 M NaOH solution

calculate the number of moles =molarity x volume/1000

= 2.5 x 500/1000 = 1.25 moles

mass = moles  x molar mass of NaOH

= 1.25 x40= 50 grams of NaOH
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Answer:1.123 x 10^-31cm

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k0ka [10]

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<u>Step 1:</u> Data given

Volume of the unknown HNO3 sample = 0.120 L

Volume of the 0.200 M Ba(OH)2 = 45.1 mL

<u>Step 2:</u> The balanced equation

2HNO3 + Ba(OH)2 ⟶ Ba(NO3)2 + 2H2O

<u>Step 3:</u> Calculate moles Ba(OH)2

moles Ba(OH)2 = molarity * volume

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<u>Step 4:</u> Calculate moles of HNO3

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The concentration of the HNO3 solution is 0.150 M

6 0
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