Please solve thanks. <3 You have a 2M stock solution of sodium fluoride NaF and

Question

Please solve thanks. <3
You have a 2M stock solution of sodium fluoride NaF and want to make 100 ml of solution of 10nM NaF. What volume of water and stock solution will you measure out to make this new solution?
Answer: 99.5 ml water and 0.5 ml NaF stock. Please solve thanks. <3
You have a 2M stock solution of sodium fluoride NaF and want to make 100 ml of solution of 10nM NaF. What volume of water and stock solution will you measure out to make this new solution?
Answer: 99.5 ml water and 0.5 ml NaF stock. Please solve thanks. <3

Answer: 99.5 ml water and 0.5 ml NaF stock.

Explanation / Answer

If the answer is 0.5 mL and 99.5 ml then the solution should be 100 ml of 10 mM (milli molar) and not 10 nm(nano molar)

M1V1 = M2V2

2 * V1 = 100 * 10-3 *10 M

V1 = 1/2

V1 = 0.5 ml of NaF.

So, 0.5 ml NaF and remaining 99.5 ml should be of water.

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.