My crystal ball isn't working well today. You don't have nearly enough information to answer a question. You need volume NaOH. Use this
mL HCl x M HCl = mL NaOH x M NaOH and solve for the M HCl. Post your work if you get stuck.
10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 0.110 M NaOH.
What was the initial concentration of HCl?
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