Introduction to acids and bases worksheet answer key part 3

Introduction to Acids & Bases: A WebQuest

introduction to acids and bases worksheet answer key part 3

Bronsted -Lowery is different than Arrhenius because an acid or a base does not have in form KEY. Name. Date. Part 3: Arrhenius definition of an acid or base about acids and bases. You may have to use google to find the answers. H*.

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The pH scale ranges from 0 to A change of one unit on the pH scale represents a change in the concentration of hydrogen ions by a factor of 10, a change in two units represents a change in the concentration of hydrogen ions by a factor of Thus, small changes in pH represent large changes in the concentrations of hydrogen ions. Pure water is neutral. It is neither acidic nor basic, and has a pH of 7. Anything below 7.

Acids and bases have been known for a long time. When Robert Boyle characterized them in , he noted that acids dissolve many substances, change the color of certain natural dyes for example, they change litmus from blue to red , and lose these characteristic properties after coming into contact with alkalis bases. In the eighteenth century, it was recognized that acids have a sour taste, react with limestone to liberate a gaseous substance now known to be CO 2 , and interact with alkalis to form neutral substances. In , Humphry Davy contributed greatly to the development of the modern acid-base concept by demonstrating that hydrogen is the essential constituent of acids. Around that same time, Joseph Louis Gay-Lussac concluded that acids are substances that can neutralize bases and that these two classes of substances can be defined only in terms of each other.

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Historically, the first chemical definition of an acid and a base was put forward by Svante Arrhenius, a Swedish chemist, in Table Identify each compound as an Arrhenius acid, an Arrhenius base, or neither. Acids have some properties in common. They turn litmus, a plant extract, red. They react with some metals to give off H 2 gas.



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Identify the following solutions, whether they are acid or alkali. No change Red litmus turns blue Blue litmus turns red No change Orange colour turns red Acid 2. Blue litmus turns red No change Orange colour turns red Acid 3. Red litmus turns blue Colourless to pink Orange colour turns yellow Alkali.

Introduction to Acids and Bases (Worksheet)

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You may have to use google to find theanswers. When most people think of chemistry the first terms that come to mind are acids and bases. Many of the chemicals that people run across have some connection to acids and bases. Forinstance many people take medicine every day to cure heart burn. Another product claims that it is better for us to use because itcontains calcium.

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1 COMMENTS

  1. Lyle P. says:

    Work in groups on these problems.

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