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Acids, Bases, and SolutionsChapter 7
What is a Solution?
Same properties throughout Contains a solvent and a soluteSolutions Same properties throughout Contains a solvent and a solute
Solvent Does the Dissolving Water = Liquid
Solute The stuff that is dissolved Sugar
Kool-Aid Solvent = Water Solute = Sugar
Water is referred to as the “universal Solvent”Why?
Water dissolves almost anything
Concentration How much solute (dissolved stuff)
Dilute Weak Not a lot of solute (dissolved stuff)
Concentrated Strong A lot of solute (dissolved stuff)
Measuring ConcentrationAmount of Solute Amount of Solvent X 100
Example A solution contains 12 g of solute dissolved in 36 g of solution. What is its concentration?
Answer: 10% 12 g 36 g = .33 x 100 .33 = 33%
Example What is the concentration of a solutions that contains 45 grams of sugar in 500 grams of solution?
Answer: 9% 45 g 500 g = .09 x 100 .09 = 9%
Example How much sugar is dissolved in 500 grams of a solution if the solution is 70 percent sugar by mass?
Answer: 350g X 500 g 70%= .7 (500) = x X = 350g
Solubility A measure of how much solute (dissolved stuff) can dissolve
Unsaturated Solution Weak, Dilute Very little solute is addedAdd more sugar it will dissolve
Saturated Solution Perfect Amount No more solute will dissolveIf you add more it will settle to the bottom
Supersaturated Add so much solute that it begins to pile up on the bottom of the container
Acids and Bases
Indicators Compounds that change color when it contacts an acid or a base
Properties of Acids Sour taste Reacts with metals (corrosive)Turns litmus paper red
Properties of Bases Bitter Taste Slippery Feel Turns Litmus paper Blue
Acids Produce Hydrogen Ions (H+) in water
Bases Produce Hydroxide ions (OH-) ions in water
Strengths of Acids and BasesThe pH scale
The pH scale Range of numbers from 1-14
Ph < 7 ACIDIC H+ ions presentThe lower the number the stronger the acid (more H+ ions)
pH = 7 Neutral Not acidic or basic H+ = OH- ions
pH > 7 BASIC OH- ions present The higher the number the more basic
Neutralization A reaction between an acid and a base Salt and water produced
Check for Understanding
pH 1, pH 3 or pH 7 ? Which contains the highest concentration of Hydrogen ions? pH of 1
pH of 3 pH of 6 or pH of 3 Which is stronger?Which contains more H+ ions? pH of 3
pH of 14 pH 10 or pH 14 Which is a stronger base?Which has more OH- ions? pH of 14
Acids, Bases , & Solutions
Acids, Bases, and Solutions
Mixtures, Solutions, Acids, and Bases. Mixtures Two or more substances (elements and/or compounds) combined but NOT chemically –each substance keeps its.
Chapter: Solutions, Acids, and Bases
Acids and Bases. Properties of Acids: Properties of ACIDS: 1. tastes sour.
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.
Ch. 8 Solutions, Acids, & Bases I. How Solutions Form Definitions Types of Solutions Dissolving Rate of Dissolving.
Solutions, Acids, and Bases
Chapter 8 Solutions, Acids & Bases
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Chapter 7 Review Acids, bases, and solutions. In this solution what is the solvent and what is the solute.
Acids and Bases Chapter 15. Acids a substance which when added to water produces hydrogen ions (H + ) hydronium (H 3 O + ) is created Water + Hydrogen.
Acids and Bases. A. Definitions 1. Acid releases hydrogen ions (H + ) 2. Bases release hydroxide ions (OH - ) 3. pH scale – measures how acidic or basic.
Acids/Bases and the pH Scale
Solutions A homogeneous (uniform) mixture that contains a solvent and at least one solute Solvent = dissolves the other substances (Ex. water)
Chapter 8 Acids, Bases, and pH.
ACIDS and BASES Target: I will be able to define what makes something an acid or a base. I will be able to tell on a pH scale if something is an acid or.
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