EXPERIMENT #1: QUALITATIVE ANALYSIS OF UNKNOWN IONS IN A SOLTUION

Analysis of an Unknown

Individual Pre-lab

1. The main goal/purpose of the experiment is (what are you trying to discover in this lab):

a. What are the questions we need to answer with the results obtained from this experiment?
b. The hypothesis(es) we seek to test in this experiment is(are) (what is the basis of your experiment, see Ch.1 in your text):

2. What tests will be used to test for the presence of unknowns cations?

a. What tests will be used to test for the presence of unknown anions?
b. The key question the experiment seeks to answer is (what problem are you addressing?)
(see 1 a):
c. The controls involved in this experiment are (a control is used to minimize the unintended influence of other variables on the same system)

3. What is the best way to insure that there are no false positives or that there is not contamination or interference.?

4. The key concept(s) or theory(ies) behind the experiment is(are) (define terms like pure substance, mixture, sublimation, etc. can you explain the relevant theory):

a. How can selective precipitation be used to identify unknown ions?
b. The important technique(s) used in this experiment is(are) (sublimation, etc.) Please describe:
c. What technique is used to separate precipitate from ions that remain dissolved in the solution?
d. What technique is used to treat precipitate or solution for presence of an unknown ion?
e. The experiment is based on the following assumptions (identify your assumptions and determine if they are justifiable):

5. Discuss the importance of selective participation.

6. The data that will be collected in the experiment are (what do you plan to record in your notebook)

a. What results will be collected and recorded in your lab notebook?
b. The potential consequences of the experiment are:
c. What can be expected if positive results are obtained?
d. What might prevent positive results from being obtained?

7. The point of view behind the experiment is (make sure it's scientific).

8. What is this experiment designed to measure?

9. What can the results NOT tell us about the experiment?

10. What special safety precautions do you need to be aware of for this experiment?

Attachment:- Experiment.rar