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The pH of 0.5 M HF is 1.88. Calculate the difference in pH when 6.06 g of NaF is added to 205.7 mL of this solution. Ignore any changes in volume. The Ka value for HF is 3.5 x 10-4.
Produce MnO2 (s) and Oxygen gas. Balance the equation for the oxidation of hydroperoxide ion to O2 (g) by permanganate ion in a basic solution.
a saturated solution of bariumchloride at 30C contains 150g water. how much additional barium chloride can be dissolved by heating
Detailed calculations show that the value of Z eff for the outermost electrons in Na and K atoms is 2.51+ and 3.49+ , respectively. What value do you estimate for Zeff experienced by the outermost electron in both Na and K by assuming core electro..
Determine the pH change when 0.112 mol KOH is added to 1.00 L of a buffer solution that is 0.394 M in CH3COOH and 0.246 M in CH3COO-. Determine the pH change when 0.095 mol HI is added to 1.00 L of a buffer solution that is 0.379 M in HClO and 0.3..
What is delta S if 3.00 moles Pb is cooled from 200 °C to 25 °C {J/K}? (B)What is the molar S° (473 K) if the value at 25 °C is 26.44 J•mol -1 •K -1
Initially a mixture contains 0.795 mol each of N2 and O2 in an 8.00 L vessel. Find the equilibrium composition of the mixture at 3900 degrees Celcius.
A 10.0 ml sample of aqueous HCl requires 18.66 ml of 0.206M NaOH to reach the endpoint . What is the molar concentration of HCl ? The chemical equation of the reaction is
A researcher suspects that the pressure gauge on a 49.9-L gas cylinder containing nitric oxide is broken. An empty gas cylinder weighs 135 lb. The weight of the partially full cylinder is 161.5 lb. This cylinder is located in a relatively chilly s..
Total pressure in kPa 10 seconds after initiation of the reaction if initially there was 88.3kPa of pure N 2 O 5 vapor Enter the total pressure in kPa 10 minutes after initiation of the reaction.
Given the values of ΔH ° rxn , ΔS ° rxn , and T below, determine ΔS univ. ΔH ° rxn = 80kJ , ΔS rxn = 143J/K , T= 299K Express your answer using two significant figures.
Consider the reaction between 50.0 mL of 0.200 M sodium hydroxide and 75.0 mL of 0.100 M HCl at 25 degrees Celsius. Which of the following is true?
Two compounds have the same empirical formula. One substance is a gas, the other is a viscous liquid. How is it possible for two substances with the same empirical formula to have markedly different properties?
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