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What is the final pH of the solution when 15.0 mL of 0.133 mol L-1 KOH(aq) and 30.0 mL of 0.191 mol L-1 HF(aq) are mixed? Assume the temperature is 25 °C. For HF, pKa = 3.18 at 25 °C.
Give your answer accurate to two decimal places.
After you filter off the component that does not dissolve in dichloromethane, you will transfer the dichloromethane to a separatory funnel and wash with aqueous 1 M sodium hydroxide. Which layer is the dichloromethane layer
A procedure similar to that described in this experiment can be used to precipitate Cl- as AgCl. A sample containing chloride weighing 0.207 g was precipitated with Ag+, and the AgCl produced weighed 0.472 g. Calculate the mass % of Cl- in the ori..
Determine the pH of (a) a 0.20 M NH3 solution, (b) a solution that is 0.20 M in NH3 and 0.30 M NH4Cl
Acetylene burns in air according to the following equation. C2H2(g) + 5/2 O2(g) 2 CO2(g) + H2O(g) H0rxn = -1255.8 kJ Given that H0f of CO2(g) = -393.5 kJ/mol and H0f of H2O(g) = -241.8 kJ/mol, what is H0f of C2H2(g)
This assembly is inserted into a boiling flask. How many theoretical plates does the column assembly provide is the HETP of the saddles is 5 cm, the HETP of the Vigreux column is 8 cm, and the HETP of the empty glass tube is 15 cm
A 0.2042 g sample of KHP (MM=204.2) is dissolved in 25 ml of water. If 20.45 ml of NaOH solution is required to reach the equivalence point, what is the normality of the NaOH solution
8.20 grams of solute in 861 grams of water lower the freezing point to -0.430 degree celsius calculate the molecular mass of the nonionic solutes.
We know that the molar heat of vaporization is 39.3 KJ per mol and that the boiling point if 78.3 Celsius
What is the formal charge on the central chlorine atom in the molecular ion [ClO4]-. Assume that all of the Cl-O bonds are single bonds
Spontaneous reactions always have Delta Sr > 0 E) A Thermodynamically stable compound is a compound with a negative standard free energy of formation
How much does the atmosphere weigh over each square kilometer (km2)? Recall that 106 m2 = 1 km2 .
The air in the balloon is then heated to 62 degree celsius, causing the balloon to expand to a volume of 4.20x10^3 m^3. What is the ratio of the number of moles of air.
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