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How many moles of of OH- ions are needed to completely neutralize 0.50 liters of 2 M HCL?
Wiki User
∙ 12y ago
2 M HCl means that the concentration is 2 mols per litre. Many starting chemists have a hard time remembering that, probably because it's a contraction that really isn't required. But there you have it. If someone says "2 molar", that's 2 mols per litre.
Anyhow, half a litre is obviously 1 mol HCl, in this case. Then we just need to know that one HCl molecule is neutralized by one OH- ion. (We can easily see this since HCl exists as H+ and Cl-, and the H+ ion content is how we commonly gauge acidity of solution. Then we see that H+ and OH- can form H2O, neutralising the solution).
Thus, the answer is 1 mol of OH-.
Wiki User
∙ 12y ago
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