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 calculate the percent yield of the unknown. 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\. because you will be synthesizing the unknown substance from scratch. because you need to use the same equipment as in \synthesis and analysis of alum\.

Explanation:

In a lab, when dealing with an unknown substance, using the same techniques (like measuring melting point or solubility) as in a previous "Synthesis and Analysis of Alum" lab helps in proposing procedures for identification. This is because the prior - lab techniques are relevant and can be adapted.

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".