Question

why does the lab manual ask you to review your procedures from the \synthesis and analysis of alum\ lab?
select one.
because you need to use the same equipment as in \synthesis and analysis of alum\.
because you need to calculate the percent yield of the unknown.
because you will be synthesizing the unknown substance from scratch.
because the techniques you used in \synthesis and analysis of alum\, such as measuring melting point or solubility, are the same types of procedures you might propose for identifying your unknown in \synthesis and analysis of alum investigations\.

Explanation:

In a lab, when dealing with similar investigations like "Synthesis and Analysis of Alum", using the same techniques (e.g., measuring melting point, solubility) is logical. These techniques are standard for substance characterization. Re - using them ensures consistency and reliability in identifying the unknown.

Answer:

Because the techniques you used in "Synthesis and Analysis of Alum", such as measuring melting point or solubility, are the same types of procedures you might propose for identifying your unknown in "Synthesis and Analysis of Alum Investigations".