Question

Based upon the molarities of the standardized HCl and standardized NaOH, and the volumes of each added to analyze the antacid samples, calculate the MILLIMOLES of HCl needed to neutralize the tablet per MILLIGRAM of sample.
Use the same sequence as you entered the mass of the samples and report your results to 4 significant figures.

Previous Question Score/Possible Points: No score possible Total Score So Far Total Exercise Points: 63/91 Part IIC Scoring Scheme: 3-3-2-1 Based upon the molarities of the standardized HCl and standardized NaOH, and the volumes of each added to analyze the antacid samples, calculate the MILLIMOLES of HCl needed to neutralize the tablet per MILLIGRAM of sample Use the same sequence as you entered the mass of the samples and report your results to 4 significant figures. Entry # mass tablet(g) 1.289 1.242 1332 mass antacid(g) 0.6000 0.6010 0.6000 Vol HCl(mL) 14.00 14.00 14.00 Vol NaOH(mL) mmoles HC/mg 13.90 13.91 13.06 #2: #3: Submit Answen'Continue Quit Post-Lab 36) Part IIC Data Entry -No Scoring For each of the three trials of the analysis of the antacid, what was the volume of standardized NaOHH required to titrate the residual standardized HCI after it reacted with the antacid? Enter the volumes in the same sequence as the corresponding mass of antacid sample and to the nearest 0.02 mL, e.g. 37.54 mL Your Answer: 13.9 Your Answer: 13.91 Your Answer: 13.06 No Points Possible No Points Possible No Points Possible

Answer 1

Solutdon Griven l The molosities of Stananlie CI and Stobelhedl NOOH consideste moosily of HCl to be χ(MP 128 mg Hcl I ma tablet X mmoi tabled 's needled ooI0 mmo le Hc 280 :. 1 mg tablt mmo abied is nee d ed o1l mgHcU 1242- 3) 14x mmol HCl 're eole dl to neutzaliSe 332 Lablet-13 mHct : tmg tabet x mmol tabted is neecled ooto5 1332 considlex he oity of NaoH to bj y(M) So 13 goy mmot N haoH s needed to neutaise Gooo antacidニ600 mqNaoH

mg bable 13901 mmo antacid s necded023 m HCt o0 13-91 mL y(M) Nao H = 1.391 y mmole- nacH , 13-91 m mo ! ^aô# is needed to neubalise 06010g antacid -Gol mg HCl Ing table- 13.91 y mmol antacid S needed - oom c 6ol So, 13 oG mmot NaoH s needed to neuaaise o600o g antacid 600 ma Hc table 13.06 600 mmoles HClIm 0.0231 mg HCI