Label the following changes as CHEMICAL or PHYSICAL change
1. Fat reacting with sodium hydroxide
2. Chemical A originally is buoyant in water; after it mixed with HCI, the new substance now sinks in water
Label the following reactions as exothermic or endothermic
1. Ammonium and calcium chloride mix, the temperature rises
2. Baking soda and methane are mixed, the temperature decreases
Label the following as PHYSICAL or Chemical Property
1. Ability to rust
2. Magnetic
Please, any help is appreciated! Thank you very much, hope you're having a good 2017.
Any time you have a reaction it is chemical. If a new substance is formed it is chemical.
Reactions that produce heat are exothermic.
Reactions when T goes down are endothermic.
Rust and magnetic. see
https://www.google.com/search?q=is+ability+to+rust+chemical+or+physical+property&ie=utf-8&oe=utf-8
Sure! I'd be happy to help you with your questions.
1. Fat reacting with sodium hydroxide: This is a chemical change. When fat reacts with sodium hydroxide, it undergoes a chemical reaction called saponification, which produces soap and glycerol.
2. Chemical A initially being buoyant in water and then sinking after mixing with HCI: This is also a chemical change. The change in buoyancy indicates that a new substance with different properties has been formed. The reaction between Chemical A and HCI likely resulted in the formation of a heavier or denser product, causing it to sink in water.
Now, let's move on to the reactions:
1. Ammonium and calcium chloride mix, and the temperature rises: This is an exothermic reaction. An increase in temperature indicates that energy is being released from the reaction to the surroundings.
2. Baking soda and methane mixed, and the temperature decreases: This is an endothermic reaction. A decrease in temperature signifies that energy is being absorbed from the surroundings into the reaction.
Finally, let's address the physical and chemical properties:
1. Ability to rust: This is a chemical property. Rusting is a chemical process that occurs when iron or other metals combine with oxygen in the presence of water to form iron oxide, resulting in a change in the substance's composition.
2. Magnetic: This is a physical property. Magnetism is an inherent physical property of certain materials that allows them to attract or repel other magnetic materials.
I hope my explanations were helpful! If you have any more questions, feel free to ask. Have a great year ahead!