0.172 g of potassium hydrogen phthalate (KHP) was titrated with NaOH. When 31.5 mL of the KOH had been added to the acid, the indicator (phenolphthalein), changed color. What is the concentration of the NaOH solution? The molar mass of KHP is 204 g/mol. Enter your answer with three decimal places. Example: 0.544 Do not include units. 0.027

Aa.23.

An analytical chemist weighs out 0.138 g of an unknown monoprotic acid into a 250 mL volumetric flask and dilutes to the mark with distilled water. He then titrates this solution with 0.0600M NaOH solution. When the titration reaches the equivalence point, the chemist finds he has added 25.5 mL of NaOH solution. Calculate the molar mass of the unknown acid. Round your answer to 3 significant digits. 0 mol X S 629 OL A

3.45 mol of LiCl in 3.53 L of solution Express the molarity in moles per liter to three significant figures. 29.23 gC6H12O6 in 1.13 L of solution Express the molarity in moles per liter to three significant figures. 38.0 mgNaCl in 106.2 mL of solution Express the molarity in moles per liter to three significant figures.

One way to determine the hardness of a water sample is to precipitate the calcium out of solution as a carbonate.  The net ionic reaction for this precipitation is:                         Ca2+(aq)  +  CO32-(aq)  →  CaCO3 (s)   A 1.00 L sample of water is drawn from a Phoenix, AZ well and 0.534 g of calcium carbonate is recovered using the above reaction. What was the Ca2+ concentration of the original water sample in ppm? Show your work and include units.  Hint:  ppm stands for parts per million, and in the case of an aqueous solution, this is equivalent to mg/L.

5.00 ml of 7.35 M Fe(NO3)3 is combined with 1.00 mL of 0.50 M HCIO4 and 4.00 ml of 2.00 x 10-2 M KSCN. What is the concentration of Fe3+ in the solution after the other reactants are added? Enter your answer with two decimal places. Example: 1.32 Do not include units in your answer.

- Part B The reaction described in Part A required 3.28 L of sodium chloride. What is the concentration of this sodium chloride solution? Express your answer with the appropriate units. View Available Hint(s) Value Units Submit When solutions of silver nitrate and sodium chloride are mixed, silver chloride precipitates out of solution according to the AgNO3 (aq) + NaCl(aq)→A£CI(s)+ NaNO3(aq) Part A What mass of silver chloride can be produced from 1.03 L of a 0.181 M solution of silver nitrate? Express your answer with the appropriate units. > View Available Hint(s) HA mass of AgCl = 873.9 Submit Previous Answers

A chemist performs a gravimetric analysis. The chemist combines 1.00 L of 2.00 M AGNO, (ag) with 1.00 L of 4.00M NaCl (ag) in an Erlenmeyer flask. Both the AgNO3 (aq) solution and the NaCl(aq) solution are colorless. After the mixture has been stirred, a cloudy white substance is observed at the bottom of the flask. What is the expected mass of AgCl (s), in grams, assuming that the yield is 100%? In the box, enter the mass to the nearest gram.

You perform a titration between Sodium hydroxide (NaOH) and Carbonic Acid (H₂CO3). The NaOH is in the burette and the H₂CO3 is in the Erlenmeyer Flask. 42.5 mL of 0.50 M NaOH was added to 25.6 mL of H₂CO3, what is the concentration of the H₂CO3? Give your answer to 2 decimal places..

0.644 g of wood bleach, which contains oxalic acid, H2C2O4, was placed in an Erlenmeyer flask.  The wood bleach was titrated with 23.57 mL of 0.379 M KOH solution.  Determine the percent by mass of the H2C2O4 (a diprotic acid) in the sample of wood bleach. Enter your answer with the correct number of significant figures.  If you do not enter the correct number of significant figures, your answer may be graded as incorrect even if it is otherwise correct.