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Results tagged with solutions
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user 68180
This tag should be applied to questions dealing with solutions of any kind. A solution is a liquid or solid phase containing more than one substance where, for convenience, one (or more) substance(s) called the solvent is treated differently from the other substances, which are called solutes. If water is the solvent, then the more appropriate 'aqueous-solution' tag should (also) be specified.
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Calculate the final molarity from 2 solutions
Molarity (M) = moles (n) / liters (L)
70 mL of 3M NaCl = .21 mol NaCl
30 ml of 1M NaCl = .03 mol NaCl
.21 mol + .03 mol = .24 mol NaCl
70 mL + 30 mL = 100 mL = .1 L
M = n/L = .24 / .1 = 2.4 M
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Calculate pH at equivalence point [closed]
Calculate the pH at the equivalence point of a titration of 62 mL of 0.1 M $\ce{CH_3NH_2}$ with 0.20 M HCl. The $\ce{K_b}=4.4\cdot10^{-4}$.
At the equivalence point, the moles of CH3NH2 equals th …