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Intro to Acids & Bases General Properties Indicators Neutralization Reactions.

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Presentation on theme: "Intro to Acids & Bases General Properties Indicators Neutralization Reactions."— Presentation transcript:

1 Intro to Acids & Bases General Properties Indicators Neutralization Reactions

2 Objectives 8.3.1) Describe what determines if a substance is an acid or a base 8.3.2) List the general properties of acids 8.3.3) List the general properties of bases

3 Objectives 8.3.4) Describe an indicator 8.3.5) Describe a neutralization reaction, including the reactants and products

4 Acids A compound that produces hydronium ions (H 3 O + ) when dissolved in water  Ex: HCl + H 2 O → H 3 O + + Cl - Common Acids: Hydrochloric acid (HCl), Nitric Acid (HNO 3 ), Sulfuric Acid (H 2 SO 4 )

5 General Properties of Acids Sour Taste  Ex: Citric Acid (citrus fruits), Acetic Acid (vinegar) Reacts with metals  to produce H 2 gas) Produces certain color changes in indicators  blue litmus → red

6 Bases A compound that produces hydroxide ions (OH - ) when dissolved in water  Ex: NaOH → Na + + OH - Common Bases:  Calcium Hydroxide Ca(OH) 2 ; Sodium Hydroxide NaOH; Magnesium Hydroxide Mg(OH) 2

7 General Properties of Bases Bitter Taste  Ex: Chocolate w/o sugar contains the base theobromine Slippery Feel (soap) Produces certain color changes in indicators  red litmus → blue

8 Indicators Any substance that will change colors based on different conditions, especially in the presence of acids or bases  Examples: litmus paper, phenolphthalein

9 Neutralization Reactions Chemical reaction between an acid and a base The negative ions (anions) from the acid combine with the positive ions from the base (cations) to form an ionic compound called a salt Second product is water

10 Neutralization Reactions HCl + NaOH →  HCl + NaOH → HOH + NaCl HNO 3 + Mg(OH) 2 → ?  HNO 3 + Mg(OH) 2 → Mg(NO 3 ) 2 +H 2 O H 2 SO 4 + LiOH → ?  H 2 SO 4 + LiOH → Li 2 SO 4 + H 2 O


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