Presentation is loading. Please wait.

Presentation is loading. Please wait.

Which is the best to use to determine if something is an acid or a base: Phenothalein, universal indicator, or pH paper? Agenda for Friday Oct 7th Finish.

Published bySybil Lynch Modified over 9 years ago

Similar presentations

Presentation on theme: "Which is the best to use to determine if something is an acid or a base: Phenothalein, universal indicator, or pH paper? Agenda for Friday Oct 7th Finish."— Presentation transcript:

1 Which is the best to use to determine if something is an acid or a base: Phenothalein, universal indicator, or pH paper? Agenda for Friday Oct 7th Finish lab Acid/base notes Video

2 What is pH Def - A value used to express how acidic or basic something is Look at how many hydronium or hydroxide ions H3O+ or OH-

3 pH Scale the pH scale ranges between 0 and 14, with 7 being neutral
A substance with a pH less than 7 is acidic. If greater than 7, the substance is basic or alkaline change in pH is a tenfold increase or decrease in the strength of the acid or base

4 Acid or base Acid – proton donor, increase in hydronium ions when added to water Properties Sour in taste Conducts electricity

5 Acid or base Base – proton acceptor, increase in hydroxide ions in water Properties Bitter, soapy taste Solutions feel slippery Just as dangerous as acids

6 Acid – Base reactions Neutralization reaction – reaction with an acid and a base Forms water and salt Not all neutralization reactions produce neutral solutions

7 Agenda for Monday Oct 10th 1. Neutralization of acid and base

8 Neutralizations

9 The “used” water problem

10 Agenda for Tuesday Oct 11th 1. Acid rain

11 Acid Rain Robert Angus Smith, an English chemist, first used the phrase "acid rain" in 1852 noted the connection between London's polluted skies and the acidity of rain "normal" rainfall has a pH of 5.6 Acid rain is defined as any form of wet precipitation which has a pH less than5.6

12 Sources of Acid Pollution
gases sulfur dioxide and various nitrogen oxides primarily created by industrial factories, coal-fired power, plants, and car emissions Some scientists believe that natural sources (forest fires, lightning, volcanoes, etc.) have an equally important effect

13 Sources Continued Areas where the soil has been disturbed (mines, forest fires, landslides, construction sites) may be making water more acidic Many soils are already acidic or contain minerals which react with rainwater, snow melt, etc., to form acids. The gases SO2 and NOx are thought to be carried long distances by air currents.

14

15

Download ppt "Which is the best to use to determine if something is an acid or a base: Phenothalein, universal indicator, or pH paper? Agenda for Friday Oct 7th Finish."

Similar presentations

NOTES 10 – Acids, Bases, & pH.

NOTES 10 – Acids, Bases, & pH.
Occasionally, a hydrogen atom shared by two water molecules shifts from one molecule to the other. Occasionally, a hydrogen atom shared by two water molecules.

Occasionally, a hydrogen atom shared by two water molecules shifts from one molecule to the other. Occasionally, a hydrogen atom shared by two water molecules.
PH Scientists use something called the pH scale to measure how acidic or basic a liquid is The scale looks at the concentration of positively charged hydrogen.

PH Scientists use something called the pH scale to measure how acidic or basic a liquid is The scale looks at the concentration of positively charged hydrogen.
1 Acid Vs Base Characteristics of Acids: Sour taste Change blue litmus paper red; red litmus paper does not change Produce hydronium ions (H 3 O + ) when.

1 Acid Vs Base Characteristics of Acids: Sour taste Change blue litmus paper red; red litmus paper does not change Produce hydronium ions (H 3 O + ) when.
Chapter 9 – Acids and Bases BELLWORK Pure vinegar is an acid, called ________ acid.

Chapter 9 – Acids and Bases BELLWORK Pure vinegar is an acid, called ________ acid.
Acids in the Atmosphere - Unit 4C Unit 4.C. 1 Acid Rain.

Acids in the Atmosphere - Unit 4C Unit 4.C. 1 Acid Rain.
Chemical Reactions Chapter 13. Acids Have a sour taste. Vinegar owes its taste to acetic acid. Have a sour taste. Vinegar owes its taste to acetic acid.

Chemical Reactions Chapter 13. Acids Have a sour taste. Vinegar owes its taste to acetic acid. Have a sour taste. Vinegar owes its taste to acetic acid.
9.2 What are acids? An acid is a compound that dissolves in water to make a particular kind of solution. Chemically, an acid is any substance that produces.

9.2 What are acids? An acid is a compound that dissolves in water to make a particular kind of solution. Chemically, an acid is any substance that produces.
Acids and Bases. Properties of Acids: Properties of ACIDS: 1. tastes sour.

Acids and Bases. Properties of Acids: Properties of ACIDS: 1. tastes sour.
100 400 100 200 300 400 500 300 400 100 200 100 Acids Bases Acids Bases Neutral- ization Equations Acid Rain Misc. Jeopardy Final Jeopardy.

Acids Bases Acids Bases Neutral- ization Equations Acid Rain Misc. Jeopardy Final Jeopardy.
PH Scale. Acids and bases Acids and bases are of enormous importance in general chemistry, since they provide an effective way of understanding the properties.

PH Scale. Acids and bases Acids and bases are of enormous importance in general chemistry, since they provide an effective way of understanding the properties.
CHAPTER 8 ACIDS & BASES. IDENTIFYING ACIDS A. IDENTIFYING ACIDS A. AN ACID IS A COMPOUND THAT PRODUCES HYDRONIUM IONS (H 3 O + ) WHEN DISSOLVED IN WATER.

CHAPTER 8 ACIDS & BASES. IDENTIFYING ACIDS A. IDENTIFYING ACIDS A. AN ACID IS A COMPOUND THAT PRODUCES HYDRONIUM IONS (H 3 O + ) WHEN DISSOLVED IN WATER.
Acids, Bases, Salts and pH Physical Science. Acids Acids are chemicals in which the positive ion is a hydrogen atom. n for example; HCl or H 2 SO 4 n.

Acids, Bases, Salts and pH Physical Science. Acids Acids are chemicals in which the positive ion is a hydrogen atom. n for example; HCl or H 2 SO 4 n.
Emissions of sulfur dioxide and nitrogen oxides react with water vapor in the atmosphere to create sulfuric and nitric acids Natural sources like volcanoes,

Emissions of sulfur dioxide and nitrogen oxides react with water vapor in the atmosphere to create sulfuric and nitric acids Natural sources like volcanoes,
And its effects on soil. When nitrogen and/or sulfur emissions enter the atmosphere they will combine with water to create nitric acid and sulfuric acid.

And its effects on soil. When nitrogen and/or sulfur emissions enter the atmosphere they will combine with water to create nitric acid and sulfuric acid.
Section 14.1 An acid is a substance that produces hydronium ions (H 3 O + ) when it dissolves in water.acid A hydronium ion (H 3 O + ) consists of a hydrogen.

Section 14.1 An acid is a substance that produces hydronium ions (H 3 O + ) when it dissolves in water.acid A hydronium ion (H 3 O + ) consists of a hydrogen.
The Chemistry of Acids & Bases. Properties of Acids Dilute solution have a _____taste Aqueous solutions conduct an electric current  What do we.

The Chemistry of Acids & Bases. Properties of Acids Dilute solution have a _____taste Aqueous solutions conduct an electric current  What do we.
 An acid is a substance that produces a hydronium ion (H 3 O + ) when placed in water.  Examples of Acids:

 An acid is a substance that produces a hydronium ion (H 3 O + ) when placed in water.  Examples of Acids:
ACIDS AND BASES Sections 8.3 and 8.4. Acids A acid is a compound that produces hydronium (H 3 O + ) ions when dissolved in water. Examples: HCl – hydrochloric.

ACIDS AND BASES Sections 8.3 and 8.4. Acids A acid is a compound that produces hydronium (H 3 O + ) ions when dissolved in water. Examples: HCl – hydrochloric.
Acids and Bases. Acid Group of compounds with some common properties when in solution Group of compounds with some common properties when in solution.

Acids and Bases. Acid Group of compounds with some common properties when in solution Group of compounds with some common properties when in solution.

Similar presentations

Ads by Google