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What is the ph of a solution that is 0.0020 M acetic acid and 0.010 M sodium acetate? Note: the pKb for sodium acetate is 9.25
Identify the subshell in which electrons with the quantum number n = 5, l = 4 are found. (Just write A,B, C, D, or E on the answer sheet) a) 5d b) 5p c) 5g d) 5f e) 4f
At what temperature would a 1.80 m NaCl solution freeze, given that the van't Hoff factor for NaCl is 1.9? Kf for water is 1.86 degrees C/m. answer in degrees C
The following statements describe some physical and chemical properties of sucrose (table sugar). Which response includes all that describe chemical properties, and none that describe physical properties?
A mysterious material was purified from safflower oil (hint: full of fatty acids). Upon ozonolysis it gave the following compounds in their respective molar ratios.
Nicotine is responsible for the addictive properties of tobacco. Assume Kb1= 1.05 x 10^-6 and Kb2= 1.32 x 10^-11. Determine the pH of a 0.00120 M solution of nicotine.
A rigid tank of volume 0.5 m^3 is connected to a piston cylinder assembly by a valve, as shown below. Both vessels contain pure water. They a re immersed in a constant-temperature bath at 200°C and 600 kPa
Calculate the pH of the following solutions A) 0.10 M hydrogen sulfide? B) 1.0*10^-4 M benzoic acid (check Ca/Ka ratio)? C) 0.09 M methylamine
where all compounds are assumed as covalent then determine which reaction must be endothermic and also explain your answer briefly?
The enthalpy change for the reaction A + 2B ? 3C, can be determined using the following equations: (1) 2Z + C ? X ?H = 15 kJ(2) 2B + 3X ? 3Z ?H = 30 kJ(3) 6X ? A + 9Z ?H = 20 kJ
Aqueous solutions of each of the following salts {sodium acetate, sodium phosphate, sodium formate, and sodium carbonate} have a pH that is > 7. The reason for this is that the anion undergoes a so-called "hydrolysis reaction".
A compound with the empirical formula CH2O was found to have a molar mass between 89 and 91 g. What is the molecular formula of the compound?
how to find the molar concentration of a soloution of phosphoric acid if 17.8 mL of it neutralizes 20.0 mL of 0.050 mol/L calcium hydroxide.
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