Balance the redox reaction below using the half-reaction method. Sn2+(aq) + In(s)Sn(s) + In3+(aq) (a) To show your method, write the balanced half reactions below. Use the smallest integer coefficients possible and show electrons as e- . If a box is not needed, leave it blank. (Coefficients of 1 are not needed). Oxidation half-reaction: + + Reduction half-reaction: + + (b) To show your balanced equation, enter an integer in each of the boxes. If the integer is "1," do enter it even though you would normally not show that in the equation. Use the smallest integer coefficients possible. Sn2+(aq) + In(s) Sn(s) + In3+(aq)

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

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Ascientist wants to know how individual lions within a pride interact with each other in their own environment. to do this, the scientist sedates and tags all of the lions within a pride. then, he places several remotely-controlled video cameras near the lions' den and performs an observational field study. he collects continuous video footage over the span of one year, analyzes the video, and then forms conclusions based on his observations.