Chemistry
chrissyhenning0
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15.0mL of an unknown concentration of HCl reacts completely with 20.00mL of 1.0M NaOH.determine the concentration of the acid

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(1) Answers
michaelaroman

molar mass HCl = 36.5 g/mol  and NaOH = 40.0 g/mol molarity of NaOH = 1.0 M Volume of NaOH = 20.00 mL in liters : 20.00 / 1000 = 0.02 L Number of moles NaOH : n = M * V n = 1.0 * 0.02 n =  0.02 moles Of NaOH Finally Molarity of the acid solution Volume HCl :  15.0 mL in liters : 15.0 / 1000 = 0.015 L 1 HCl + 1 NaOH = 1 H₂O + 1 NaCl 1 mole HCl --------- 1 mole NaOH ? mole HCl ---------  0.02 moles NaOH moles HCl = 0.02 * 1 / 1 = 0.02 moles of HCl M ( HCl) = n / V = 0.02 / 0.015 = 1.333 M of HCl hope this helps!

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