High School

How do you find the concentration of the hydroxide ion with 25.0 mL of Ca(OH)₂ solution, 0.028 M HCl, and 38.1 mL of water?

a) 0.056 M
b) 0.084 M
c) 0.112 M
d) 0.140 M

Answer :

Final answer:

To find the concentration of hydroxide ion, use the neutralization reaction between Ca(OH)₂ and HCl to calculate the required concentration.

Explanation:

To find the concentration of the hydroxide ion with the given solutions, you can use the concept of neutralization reaction between Ca(OH)₂ and HCl. Here's how you can calculate it:

  1. Calculate the moles of Ca(OH)₂.
  2. Calculate the moles of HCl used in the reaction.
  3. Find the remaining moles of HCl after the reaction.
  4. Calculate the concentration of hydroxide ions.

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