About this document
Percent Composition of a Modern Penny by d0cum3nt123 is a document available to read on EtoBox.
1. The document describes a lab experiment to determine the percentage composition of copper and zinc in a penny through chemical reaction. Students will file grooves in a penny to expose the zinc core, then react it in hydrochloric acid overnight to dissolve the zinc, leaving only the copper coating, which can then be weighed to calculate the percentages. 2. Safety precautions like wearing gloves and goggles are outlined. The procedure involves preparing, weighing, and reacting the penny in acid over two
- Author
- d0cum3nt123
- Language
- EN