How many mL of 2M stock solution would I use to prepare 0.500 L of 0.1 M NaCl?

25 mL

Explanation:

Step 1: Given data

Step 2: Calculate the volume of the concentrated NaCl solution

We will use the dilution rule.

C₁ × V₁ = C₂ × V₂

V₁ = C₂ × V₂ / C₁

V₁ = 0.1 M × 0.500 L / 2 M

V₁ = 0.025 L = 25 mL

that's just how they are

explanation:

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- lead + phosphoric acid = hydrogen + lead(ii) phosphate