Antacid Lab Date - NaOH used: 17.00 mL Percent Difference...

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HC 8 H 4 O 4 - + OH - H 2 O + C 8 H 4 O 4 2- Molarity = moles/volume (L) % Difference = |M1-M2|/½(M1+M2) x 100 Molarity of unknown = Mk x Vk x mol u/mol k x 1/Vu └Moles K┘ NaOH used = | Start NaOH – End NaOH | 0.1 M NaOH 0.1 = mol/0.015L mol NaOH = 0.0015 mol 0.0015 mol NaOH x 1 mol KHP/1 mol NaOH = 0.0015 mol KHP 0.0015 mol KHP x 204.44g MM KHP = 0.307g KHP Bottle ‘G’ for NaOH used Titrations 1. 0.315g KHP used 0.315g KHP/204.44g MM KHP = 0.00154 molKHP Start NaOH: 0.59 mL 0.00154 mol KHP x 1 mol NaOH/1 mol KHP x End NaOH: 18.63 mL 1/0.01804 L NaOH = 0.0854 M NaOH NaOH used: 18.04 mL 2. 0.389g KHP used 0.389g KHP/204.44g MM KHP = 0.00190 molKHP Start NaOH: 18.63 mL 0.00190 mol KHP x 1 mol NaOH/1 mol KHP x End NaOH: 41.52 mL 1/0.02289 L NaOH = 0.0830 M NaOH NaOH used: 22.89 mL 3. 0.299g KHP used 0.299g KHP/204.44g MM KHP = 0.00146 molKHP Start NaOH: 13.27 mL 0.00146 mol KHP x 1 mol NaOH/1 mol KHP x End NaOH: 30.27 mL 1/0.01700 L NaOH = 0.0859 M NaOH
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Unformatted text preview: NaOH used: 17.00 mL Percent Difference between titrations 1 & 2: |0.0854 0.0830|/(0.0854 + 0.0830) x 100 = 2.85% Percent difference between titrations 1 & 3: |0.0854 - 0.0859|/(0.0854 + 0.0859) x 100 = 0.58% Antacid #1: Rolaids exp. 2008 Antacid #2: Milk of Magnesia Titrations 1. Start NaOH: 30.27 mL End NaOH: 30.91 mL NaOH used: 0.64 mL 2. Start NaOH: 30.91 mL End NaOH: 34.21 mL NaOH used: 3.30 mL 3. Start NaOH: 34.21 mL End NaOH: 49.00 mL NaOH used: 14.79 mL 4. Start NaOH: 31.50 mL End NaOH: 46.63 mL NaOH used: 15.13 mL Data: Titration #1: Titration #2: Antacid: 0.199g Antacid: 0.165g HCl: 10.46 mL HCl: 10.00 mL Titration #3: Titration #4: Antacid: 0.200g Antacid: 0.195g HCl: 10.00 mL HCl: 10.00 mL Trials 1 & 2 contained Antacid #1 with 0.192 M HCl Trials 3 & 4 contained Antacid #2 with 0.192 M HCl...
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Antacid Lab Date - NaOH used: 17.00 mL Percent Difference...

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