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1) The venom of biting ants contains formic acid, HCOOH (Ka=1.8*10^-4 at 25 C). what is the pH of a 0.065 M solution of formic acid?
2) Calculate the pH of 1.00 L of a buffer that is 0.140 M HNO2 and 0.180 M NaNO2. What is the pH of the same buffer after the addition of 1.00 mL of 12.0 M. HCl. (pKa of HNO2 = 3.40). What is the pH of the Original buffer and after HCl is added?
what are the structural formulas for the following compound : 6-bromo-2-methyl-3-heptyne
The Density of the air in the room is 1.19g/L. what is the mass, in Kg of the air in a room that measures 14.5ft x 16.5ft x 8.0ft?
A buffer solution is prepared by mixing 0.500 L of 1.50 M HF and 0.400 L of 0.95M KF. What is the pH of this buffer? [Ka(HF) = 6.30 × 10-4]
the change in energy of each system and also of the composite system. the change in entropy of each system an also of the composite system.
calculate the PH of a buffer solution prepared by dissolving 21.5 g benzoic acid and 37.7g sodium benzoate in 200.0 mL of solution?
magnesium chloride are used to make a solution with a final volume of 1.74L, then waht is the final Mg2+ ion concentration in ppm?
Hypochlorite Oxidation of Cyclohexanol to Cyclohexanone, Basically in this experiment, we took some cyclohexanol and reacted it with hypochlorite to form cycohexanone.
calculate the amount of heat in kJ absorbed if a 200-g sample of water is heated from 22.8 degrees celsius to 41.5 degrees celsius with the specific heat of water being 4.184 J/ g degree celsius
What is the molarity of a calcium hydroxide solution if a 25.0 mL sample is exaclty neutralized by 42.5 mL of 0.0750 M nitric acid?
What volume of 0.150M HClO4 solution is needed to neutralize 45.00mL of 8.80×10^-2 M NaOH?
A solid mixture consists of 35.7 of KNO3 (potassium nitrate) and 6.3g of K2SO4 (potassium sulfate). The mixture is added to 130. of water. If the solution described in the introduction is cooled to 0
indicate whether each are activating or deactivating, and whether each are ortho para or meta directing substituents.
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