6/30/2016 11:55 PM 8.3/10 6/29/2016 11:57 PM Gradebook Print CalculatorPeriodic
ID: 1009708 • Letter: 6
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6/30/2016 11:55 PM 8.3/10 6/29/2016 11:57 PM Gradebook Print CalculatorPeriodic Table - Question 24 of 25 Map Sapling Learning The flask shown here contains 10.0 mL of HCI and a few drops of phenolphthalein indicator. The buret contains 0.130 M NaOH mL 5 10 15 20 25 30 35 40 45 What volume of NaOH is needed to reach the end point of the titration? Number mL NaOH What was the initial concentration of HCI? Click to begin Number M HCI Previous Give Up & View Solution O check Answer Next H Exit Y HintExplanation / Answer
okay you write volume of NaOH from buret solution is 25 mL . it is first answer
volume of NaOH = V1 = 25 mL
molarity of NaOH = C1 = 0.130 M
volume of HCl = 10.0 mL
molarity of HCl = C2 = ?
NaOH + HCl -----------------> NaCl + H2O
C1 V1 = C2 V2
0.130 x 25 = 10 x C2
C2 = 0.325 M
molarity of HCl = 0.325 M
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