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After completing the calculations below, sketch the pH curve for the titration of 20.0 mL of 0.200 M solution of a weak base, B (Kb = 1.9 x 10^-5), with 0.200 M HBr. Indicate the pH at (a) the beginning of the titration (0.0 mL titrant) and after the addition of (b) 10.0 mL, (c) 19.0 mL, (d) 19.9 mL, (e) 20.0 mL, (f) 20.1 mL, and (g) 30.0 mL of the titrant. Label the half-neutralization point and the equivalence point on the curve. Select a suitable acid-base indicator.
A canister is filled with 320 g of ice and 100 gm of liquid water, both at 0 C . The canister is placed in an oven until all the H_2O has boiled off and the canister is empty.
If 145 grams of potassium nitrate were added to water to make 1,500 mL of solution, what would be the molarity of the resulting solution?
aqueous solution has an osmotic pressure of 6.35 torr at 23.1 C. What is the molar mass of the protein.
In a manometer the mercury level at the open end of the tube is 215 mm higher than at the closed end of the tube. If the atmospheric pressure is 1 atm.
what is the global pH change incurred after injection of the HCl? What would the pH change be if this same amount of 1.000 M HCl were put into a gallon of pure water?
buffer contains 0.50 mol NH4+ and 0.50 mol NH3 diluted with water to 1.0 L. How many moles of NaOH are required to increase the pH of the buffer to 10.00? pKa of NH4+ = 9.25.
How many liters of oxygen collected over H2O and measured at 27 degrees Celsius and 745.0 mm Hg can be prepared by decomposing 4.421 grams of gold (III) oxide? The vapor pressure of H2O at 27 degrees Celsius is 26.7 mm Hg.
If 17.2 mL of 0.800 M hydrochloric acid solution are required to neutralize 5.00 mL of a household NH3 solution, determine the molar concentration of the NH3,ammonia?
A flask contains 0.190 mol of liquid bromine, rm Br_2. Determine the number of bromine molecules present in the flask.
Calculate the pH of a solution with the following: 5.12 moles of HCl are placed in a 3.00 L of water 4) Given the acid pKa is 4.76. Calculate the pH of a 0.35M acetic acid solution:
Solubility of calcite (CaCO3) will increase with a decrease in temperature and decrease with an increase in temperature. This is because the solubility of calcite is dependent on the solubility of CO2.
Distinguishing between Organic Molecules, What chemical tests might be used to distinguish between: pentanal and 2-pentanone, between benzyl alcohol and diphenylmethanol?
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