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Determine the Molarity of a 125 mL NaOH solution if upon titration with 5.5 mL of an 2.5 M HCl solution, the end point of the titration was reached

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    Write the equation and balance it.
    HCl + NaOH ==> NaCl + H2O

    1. moles HCl used = M x L = ??
    2. Using the coefficients in the balanced equation, convert moles HCl to moles NaOH.
    Since everything is a 1:1 ratio, that means moles NaOH = moles HCl.
    3. Then M NaOH = moles NaOH/L NaOH and solve for M.

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