7 4 acids bases in solution what are the properties of acids and bases
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7 -4: Acids & Bases in Solution What are the properties of acids and bases? PowerPoint PPT Presentation


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7 -4: Acids & Bases in Solution What are the properties of acids and bases?. Science Standard 8.5.e: Students know how to determine whether a solution is acidic, basic, or neutral. Input. See vocab sheet. Input & Modeling. Acids & Bases in Solution

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7 -4: Acids & Bases in Solution What are the properties of acids and bases?

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7 4 acids bases in solution what are the properties of acids and bases

7-4: Acids & Bases in SolutionWhat are the properties of acids and bases?

Science Standard 8.5.e: Students know how to determine whether a solution is acidic, basic, or neutral.


Input

Input

  • See vocab sheet


Input modeling

Input & Modeling

Acids & Bases in Solution

  • An acid produces hydrogen ions in water.

    • H+

      • The hydrogen ion is the KEY in chemical reactions

  • A base produces hydroxide ions in water

    • OH-

Do you see what the chemical formulas have in common for Acids and bases?


Input modeling1

Input & Modeling

Strength of Acids & Bases

Strength is based on how many ions are formed.

  • Strong acids and weak acids act differently in water.

  • Hydrochloric acid is a strong acid. Acetic acid is a weak acid.

  • Ammonia is a weak base and Lye is a strong base

ALL are broken up into ions in a STRONG solution

Another word for base is Alkaline


Input modeling2

Input & Modeling

The pH Scale

  • A low pH indicates that the concentration of hydrogen ions is big (meaning acidic). In contrast, a high pH indicates that the concentration of hydrogen ions is low.

  • pH scale is from 0-14- the lower the number the more acid it is

    • Below 7= acidic

    • Above 7= basic

      You use indicators (litmus paper or other) to test pH


Input modeling3

Input & Modeling

Neutral Solution

  • If the pH is 7, the solution is neutral. This means that it is neither an acid nor a base.

  • Pure water has a pH of 7.

  • If you combine an acid and a base, a neutral solution will be formed.

  • Just because a solution has low acidity does not mean it is diluted.


Input modeling4

Input & Modeling

Acid-Base Reactions

  • In a neutralization reaction, an acid reacts with a base to produce a salt and water.

  • SALT- is any positive ion formed from mixing an acid and base


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