%??.? 3% 9:00 PM C) Ouin Quie Chapter8 N nstructure.com ourses/1311475/quizzes/1
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%??.? 3% 9:00 PM C) Ouin Quie Chapter8 N nstructure.com ourses/1311475/quizzes/1816678/take D Question 10 11. Two solutions, A and B (See below.), were mixed together. Which statement true? A: 50 ml of 1.0 M HCI in water B: 50 mL of 1.0 M NaOH in water O The pH of the mixture is greater than the pH of Solution B O The pH of the mixture is less than the pH of Solution A The pH of the mixture is equal to the pH of Solution A The mixture is neutral (pH 7) uestion 11 Two solutions, A and B (See below.), were mixed together. Which statement i 75 ml of 1.0 M HCI in water B: 50 mL of 1.0 M NaOH in waterExplanation / Answer
HCl + NaOH ? H2O + NaCl
50 mL of 1 M NaOH = 50 mmol NaOH
50 ml of 1 M HCl = 50 mmol HCl
Since the reaction ratio is 1:1 and we have equal molar quantities of HCl and NaOH, there is no limiting reactant. Both HCl and NaOH will be completely consumed forming H2O and NaCl.
total volume now = 100ml
concentration of HCl = moles / volume = 50 mmol/ 100ml = 0.5 M
concentration of NaOH = moles / volume = 50 mmol/ 100ml = 0.5 M
the concentration of HCl = concentration of NaOH
HCl is a strong acid and NaOH is a strong base , so will neutralise each other to give a ph =7
With no acids or bases present, the solution is neutral. pH = 7.0 all the acids and bases will be consumed
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