Titration of 25.0 mL of an unknown concentration H2SO4 solution requires 43.6 mL of 0.0985 M NaOH solution. What is the concentration of the H2SO, solution (in M)? 0.0859 0.172 0.344 O 0.0430 no correct answer
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- Calculate the amount (in mg) of calcium chloride per tablet if the sample powder weighing 0.2382 g required 16.52 mL of 0.1150 M EDTA for titration. The weight of 20 tablets taken was 7.75 g. Answer = ____ mgThe molar solubility of the salt with generic formula AB2 is 3.26 × 10-5 M in pure water. Calculate the Ksp for this salt. no correct answer 1.39x10-13 4.25x10-9 1.59x10-18 3.46x10-14Instruction: Show your solutions. 3. A 0.9325 g sample of wheat flour was analyzed by Kjeldahl procedure. The NH3 formed was distilled into 50.0 mL of 0.05063 M HCl; a 7.73 mL back-titration with 0.04829 M NaOH was required. Calculate the percentage of protein in the flour using 5.70 factor for cereal.
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- Calculate the ratio of the molar concentrations of acetic acid and acetate ions required to achieve buffering at pH = 4.00. For acetic acid, Ka = 1.8 × 10-5 . Answer=0.189.4 mL of 2.4 M HCI is used to titrate 12.6 mL of NH3 its endpoint. What is the initial molar concentration of the NH3? answer to two significant figures.Answer if true or false , if false, put the correct answer 1. There is 11.34 mmol in 0.2011 of 0.5604 M HgCl2 2. The x axis of sigmoidal titration curve is p function of the analyte or titrant 3.The concentration of the secondary standard is relative to a primary standard 4. There is 110 mmol in 79.8 mL of 0.1379 M NH4VO3 (116.98 g/mol)