Question

Name Lab Section Date PRE-LABORATORY ASSIGNMENT 1. Which of the chemicals used in this experiment have safety hazards associated with them? List the safety hazards for each chemical. This butto e variables shows the op left of th h to 330 ni 2. Define the following, and give a specific example of each. a. strong acid motometer Teads%T. chamber If a cuve b. weak acid in the sam Look at t the top mber whe ur cuvett c. Strong base minin or of the on the on. The ce readi ution hc ck to th d. weak base te 4 fu arefully tside o the ar with the e cuvet se the 30 %T T. emov ining ampk Tre Acids and Bases 175 ne cu Spectrophotometric Determination

Answer 1

1. In general if you are using acids in the experiment, if it is strong acid it may cause burn injuries. If you are using strong base, it is highly corrosive to eyes and skin. Eye contact with bases may causes blindness. If you are using benzene in the experiment, it is hazardous to health as it is carcinogenic. If you are using cyanide, it is poisonous chemical and so on.

2. (a) A strong acid is defined as an acid that completely dissociates in an aqueous solution. Example include hydrochloric acid HCl

(b) A weak acid is an acid that is partially dissociated in an aqueous solution. Example is methanoic acid HCO₂H

(c) Strong base is completely dissociated in an aqueous solution. Example is sodium hydroxide NaOH.

(d) Weak base does not ionize fully in aqueous solution. Example is trimethyl ammonia N(CH₃)₃