Identify the type of chemical reaction: Ex. ZnCl2(aq) + Mg(s) → Zn(s) + MgCl2(aq) -> Single replacement

2KOH(aq) + CuSO4(aq) → Cu(OH)2(s) + K2SO4(aq) -> ?
2Al(s) + 3Br2(l) → 2AlBr3(s) -> ?
4PBr3(l) → P4(s) + 6Br2(l) -> ?
2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(g) -> ?

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

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?

What is produced from neutralization of an acid and a base? a. hydronium ions b. citric acid c. salt and water