Question

36. Why must a limiting reagent be used? 37. Gravimetric analysis is a what? 38. Give the example of quantitative analysis. EX 739. Define Analytical Chemistry. Ex5 AGO. What is one of the forces of a chemical reaction? 41. What is the concern of quantitative analysis? 42. Why is it more important to use ionic equations although molecular equations can be used for any reaction? 43. True or False. Whether or not a chemical reaction has taken place after mixing two solutions can be determined by observing if any of the following occurs during the reactions: precipitate, formation, gas evolution, heat evolution, or color change. F644. A precipitate is 3. An insoluble product formed in a reaction b. is indicated by the (s) for solid after the formula of the compound An exothermic reaction

Answer 1

solution: (36) limiting reagent must be use because it can tell a chemist, that with how ever much of this substance they use. Because it is limiting the reaction only x moles of product can form insted of the theoretical y when the perfect amount is use ne limiting reagent in a chemical readion is the substance that is totally consumed when the chemical reaction The amount of product formed is limited by this reagent. Since the reaction cannot continue without it. Gravimetric analysis: rechnique through which the (the ion being eing analyzed) analyzed) can be can be det determine rement of mass. amount through of an the analyte measu- (38) Exa quantitative analysis: It is the determination of relative abund- the absolute or ance of one, several or all particular substance present in a sample. e. g 0 One contain 42.88% Silver by mass- 0 The chemical reaction yielded 2.1 g moles of product- ② The solution is 0.502 m nal. 39 Analytical Chemistry. It is the study to separate identify and quantity matter. It consist of classical wet chemical met hud and modern instrument and methods classical quant qualitative methods use separation such as precipitation, extraction and distillation It is also focused on improvement in experimental design, chemo- metrics and the creation of new measurements tools.

4. One of the driving forces of a chemical reaction is the thermodynamic driving force ought to give rise to their spontaneity he their thermodynamic ability to occur. (41) The concern of of quantitative analysis is to determine the absolute or relative abundance of one, several or all particular substance present in a sample