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Calculate the pH during the titration of 10.00 mL of 0.400 M hypochlorous acid with 0.500 M NaOH. First what is the initial pH (before any NaOH is added)? The Ka for HOCl is 3.0 x 10-8 M. 1. How many mL of NaOH are added to reach the equivalence point? 2. What is the pH after 2.90 mL of NaOH are added? 3. What is the pH after 6.60 mL of NaOH are added? 4. What is the pH at the equivalence point? 5. What is the pH after 10.40 mL of NaOH are added? 6. What is the pH when half the acid has been neutralized? 7. What is the pH after 18.70 mL of NaOH are added?
A sugar-water mixture contains 45.8 g of sugar and 108.5 g of water. What is the percent by mass of sugar and the percent by mass of water in the solution?
A 56.0 mL solution of phosphoric acid is neutralized by 136.0 mL of 2.6 M NaOH. What is the concentration of the acid?
Calculate the molality of a solution containing 292g glucose(C6H12O6) dissolved in 1.91L of water.
what is the molar concentration of the salt solution formed in this reaction? What is the molar concentration of the excess reactant once this reaction has finished?
The average concentration of strontium ion in seawater is 8.00 mg of strontium ion per kg of seawater. What is the molarity of the strontium ion if the density of the seawater is 1.025 g/mL.
Each student recorded the temperature change and calculated the enthalpy of neutralization. Two of the chemists will report, within experimental error, the same temperature change for the HCl/NaOH reaction. Identify the two students and explain
An environmental chemist sampling industrial exhaust gases from a coal-burning plant collects a CO2-SO2-H2O mixture in a 21-L steel tank until the pressure reaches 850 torr at 45oC.
A 10 liter sample of oxygen 0.0°C and 15 cm. pressure is subjected to 150 cm. pressure at the same temperature. What is the new volume of the oxygen?
A 50.0 ml sample of 0.100 M HClO4 is titrated with 20.0 ml of 0.200 M NaOH. What is the pH of the resulting solution
how many milligrams of hydrazoic acid ( ka= 1.9x10^-5) must be in a 5.0-L solution that has a pH of 4.90?
The total pressure of a mixture of N2O4 and NO2 is 1.5 atm. If Kp=7.1 (at 25 degrees C) calculate the partial pressure of each gas in the mixture.
Which of the following set of quantum numbers (ordered n,l,ml,ms) are possible for an electron in an atom
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