Unit 4 Lesson 1

Toxic Reactions

Chemical Equations

Chemical formulas

• Represent changes in matter using symbols and formulas.
• Describe what happens when a single substance is changed or two or more are combined causing a change.
• Substances that you start with are called reactants and when the change takes place you end up with products.

Ex Chemical Equation: NaCN(s) + HCl(aq) ---> NaCl(aq) + HCN(g)The interpretation of a chemical equation is telling you exactly what is happening in the reaction.

The interpretation of the equation above(colors correspond): Solid sodium cyanide reacts with hydrochloric acid to produce aqueous sodium chloride and gaseous hydrogen cyanide.

Some chemicals react negatively to substances in the body and are called toxins.

Toxins - substances that interact with living organisms and cause harm.

Toxins Enter the Body

• React with water in body
• Could be molecular, ionic, or metallic substances

Practice Problems
3) a toxic substance is something that enters the body and then reacts with substances in the body where the products are harmful.
6) Forming solids that clog places in the body. Bad metals compete with good metals that the body needs. Acidic products that damage tissue.

Posted with Blogsy