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Which is the best acid to use in the preparation of a buffer with pH = 9.3? can someone show me how to get the answer?
NH2OH (Kb = 9.1 x 10^-9)
CH3NH2 (Kb = 3.7 x 10^-4)
NH3 (Kb = 1.8 x 10^-5)
C6H5NH2 (Kb = 4.3 x 10^-10)
What is the freezing point of a solution prepared by dissolving 11.3g of Ca(NO3)2 in 115g of water? (The molal freezing point depression of constant water is 1.86 °C/m).
A mixture of water and graphite is heated to 600 K. When the system comes to equilibrium it contains 0.13 mol of H2, 0.13 mol CO, 0.43 mol of H2O and some graphite
If 100.0 grams of copper (Cu) completely reacts with 25.0 grams of oxygen, how much copper(II) oxide (CuO) will form from 140.0 grams of copper and excess oxygen?
Which of the following correctly describes Tollens' reagent? a. a solution of silver nitrate in water b. a solution of silver nitrate and ammonia in water c. a solution of silver nitrate in hydrochloric acid d. none of the above correctly describe..
A 0.15 M solution of chloroacetic acid has a pH of 1.86 What is the value of Ka for this acid
List these compounds in order of increasing molar solubility in water show your calculations.
The outdoor concentration of radon is 1 pCi/L. Develop a mass balance for this problem and estimate the steady-state radon concentration in the crawl space (in pCi/L).
iodine clock reaction experiment, between iodide ions and persulfate ions, why should the rate orders w.r.t iodide and persulphate ions be integers(and therefore we can round off the experimental value to the closest integers)? I actually performe..
what is the concentration M of a NaCl solution prepared by dissolving 15.3g of NaCl in sufficient water given 455mL of solution?
If 150 ml of Al(OH)3 of unknown concentration with a methyl red indicator present is titrated with [0.535 M] HCl, the yellow solution turns red after 32.8 ml of the HCl is added. What is the molarity of the Al(OH)3 solution
A 10.0 mL sample of vinegar, an aqueous solution of acetic acid (HC2H3O2), is titrated with 0.5062 M NaOH, and 16.58 mL is required to reach the equivalence point. What is the concentration of the acetic acid?
A mist is observed to form on the mirror at a temperature 40C. Calculate mass of water removed from the pulp (kg/min) and the volumetric flow rate of air entering the system.
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