__ __ 4. How did the women get sick? Murderous Metal 1.Why is arsenic popular for poisoning back in the 1920's and where was it used? 2. Describe in detail the Reich Test (first test). What is the positive Reich Test results for arsenic? 3. Describe in detail the Marsh test (second test). If the test tube interior turns dark back after testing (Marsh test), what does it indicate? What is the positive result for Arsenic in the Marsh test?

## Step 1<br />The first question asks why arsenic was popular for poisoning in the 1920s and where it was used. Arsenic was popular for poisoning in the 1920s due to its availability and the fact that it was not readily detected by the medical community. It was often used in pesticides, insecticides, and even in some medications.<br /><br />## Step 2<br />The second question asks for a detailed description of the Reich Test (first test) and what positive results indicate the presence of arsenic. The Reich Test, also known as the Reinecke Test, is a qualitative test for arsenic. The test involves adding arsenic to a solution of sodium nitrate and sodium hydroxide. If arsenic is present, the solution turns green, indicating a positive result.<br /><br />## Step 3<br />The third question asks for a detailed description of the Marsh Test (second test) and what a dark interior in the test tube indicates. The Marsh Test is a quantitative test for arsenic. The test involves adding arsenic to a solution of zinc and hydrochloric acid. If arsenic is present, the solution turns dark, indicating a positive result.