Ca in 8) hcn is used in the treatment of wastewater treatment. hcl is a very weak acid when dissolved in water ka-6.2 × 10-10m 60-ml sample of o.150m hcl is titrated with 0.100m naoh, calculate the ph of the solution. (20) a) after 10 ml of 0.100 m naoh has been added. b) at the halfway point of the titration. c) at the equivalence point of the titration.

Salicylic acid is a very important acid. it is used to synthesize the aspirin by treating with acetic anhydride. a 0.2015-g sample of salicylic acid was dissolved in a 100.00-ml volumetric flask, and the solution was diluted to the mark. a 10-ml aliquot of this solution was titrated with standard naoh (0.01130 + 0.2% n) to a phenolphthalein faint pink color end point at 19.81 ml. (a) (calculate the normality of the salicylic acid solution used in the titration. (b) assuming the salicylic acid is pure, what is the equivalent weight of the salicylic acid? practice problems for the final exam (continued) (c) (calculate the inherent error in the determination of the equivalent weight you calculated in part (b). use the following absolute errors in the equipment /glassware when calculating the inherent error. 5.00-ml pipet: + 0.02 ml 100-ml volumetric flask: + 0.08 ml analytical balance: + 0.2 mg 25-ml buret: + 0.03 ml

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

Chemical energy is a form of a. kinetic energy only. b. both potential and kinetic energy. c. neither potential nor kinetic energy. d. potential energy only. reset