Answer:
Step-by-step explanation:
To identify the unknown metal, the industrial chemist can change its physical and chemical properties. Here are two ways the metal can be changed physically:
1. Changing the shape or form: The chemist can melt the metal and cast it into different shapes, such as rods, sheets, or wires. By observing how the metal behaves during melting and casting, the chemist can gather information about its melting point, malleability, and ductility. These physical properties can help narrow down the possible identity of the metal.
2. Changing the size or surface area: The chemist can grind or cut the metal into smaller pieces or increase its surface area by creating a powder or filing it down. Changing the size or surface area exposes more of the metal's surface to react with other substances. This can provide insights into the metal's reactivity and susceptibility to corrosion.
Now, let's explore two ways the metal can be changed chemically:
1. Reacting with acids: The chemist can test the metal's reactivity by exposing it to different acids, such as hydrochloric acid or sulfuric acid. By observing any chemical reactions, such as effervescence (formation of gas bubbles) or the production of salts, the chemist can gain information about the metal's reactivity and its position in the reactivity series.
2. Oxidation-reduction reactions: The chemist can subject the metal to oxidation-reduction reactions. For example, they can react the metal with oxygen to form an oxide or with another compound to displace a less reactive metal. These reactions can provide valuable clues about the metal's reactivity and its ability to gain or lose electrons.
It's important to note that these are just a few methods the industrial chemist could use to identify the unknown metal. Other techniques, such as spectroscopy or x-ray diffraction, may also be employed depending on the specific circumstances.