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A solution is prepared by mixing 2.50 g of acetic acid (CH3CO2H, FW= 60 g/mol, Ka= 1.75 x 10-5) with 4.70 g of sodium acetate (CH3CO2Na, FW = 82 g/mol) and adding water to a 500 mL volume.
a.) What is the pH of the solution?
b.) 15 mL of a 0.50 M HCl were added to the 500 mL solution, what is the pH after addition of the acid?
We titrated each layer with 0.10 NaOH and found that 1. took 2.57 mL of NaOH to titrate and 2. took 0.08 mL of NaOH to titrate. What is the concentration of acid in 1 and 2?
which caused the CO2 in the sample to precipitate as BaCO3. The excess base was back-titrated to a phenolphthalein end point with 23.6ml of .0108 M HCl. What is the concentration of CO2 in the air in parts per million? use 1.98g/L for the density ..
What is the concentration of [Br?] in a solution of 15 mL of 5 M HBr when 5 mL of water is added?
What is the FORMULA for the limiting reagent. What amount of the excess reagent remains after the reaction is complete. grams
if 3.30 moles of ethane c2h6 undergo combustionaccording to the unbalanced equation c2h6o2--gt co2h2o how many moles of
a sample of HCI is placed in a 256ml flask where it exerts a force of 67.5 mmHg. What is the pressure of the gas if it is transfered to a 135mL flask?
if 32.7 ml of 0.225 m koh is required to completely neutralize 28.0 ml of a ch3cooh solution what is the molarity of
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Assuming that you start with 2.00 g of sodium benzoate and 5 mL of 3M HCl, how many molar equivalents of HCl are you using? Use two decimal places.
a gaseous system undergoes a change in temperature and volume. what is the entropy change for a particle in this system
What is the final temperature of the substances in part 1 when 125.5g samples (of each) evolve 2.50kJ of heat (initial temperature=90°C)?
Draw the major product for each reaction below. Include stereochemistry where relevant. write "N.R." for "no reaction. a. 2-butyne + H2 (over pt)
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