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Rus_ich [418]
3 years ago
14

How many ml of 0.10 m naoh should the student add to 20 ml?

Chemistry
1 answer:
zavuch27 [327]3 years ago
3 0
I'm not sure exactly what you're asking here, but I'll give it a shot.

If you take 20 mL of .10 M NaOH, solve for how many moles you have

20 mL / 1000 mL x .10 M NaOH = .002 moles NaOH
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Read 2 more answers
What is molarity of 47.0 g KCl dissolved in enough water to give 375 mL of solution?
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This question provides us –

  • Weight of \bf  KCl is = 47 g
  • Volume, V = 375 mL

__________________________________________

  • Molar Mass of \bf   KCl –

\qquad \twoheadrightarrow\bf  39.0983 \times 35.453

\qquad \twoheadrightarrow\bf 74.5513

<u>Using formula</u> –

\qquad \purple{\twoheadrightarrow\bf Molarity _{(Solution)} =  \dfrac{ W\times 1000}{MV}}

\qquad \twoheadrightarrow\bf Molarity _{(Solution)}  = \dfrac{ 47 \times 1000}{74.5513\times 375}

\qquad \twoheadrightarrow\bf Molarity _{(Solution)}  = \dfrac{47000}{27956.7375}

\qquad \twoheadrightarrow\bf Molarity _{(Solution)}  = \cancel{\dfrac{47000}{27956.7375}}

\qquad \twoheadrightarrow\bf Molarity _{(Solution)}  = 1.68117M

\qquad \pink{\twoheadrightarrow\bf Molarity _{(Solution)}  = 1.7M}

  • Henceforth, Molarity of the solution is = 1.7M

___________________________________________

6 0
2 years ago
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