Chemistry II Chapter 10 Test

A 50.00 mL sample of a potassium hydroxide is titrated with a 0.8186 M HCl solution. The titration requires 27.87 mL of the HCl solution to reach the equivalence point. What is the molarity of the KOH solution?

(.8186)(27.87) = (M)(50.00; .4563 M KOH

A student titrates a 20.00 mL sample of a solution of HBr with unknown molarity. The titration requires 20.05 mL of a 0.1819 M solution of NaOH. What is the molarity of the HBr solution?

(M)(20.00) = (.1819)(20.05); .1824 M HBr

What is the pH of a 0.000460 M solution of Ca(OH)2?

-log(4.60 x 10^-4) = 3.337, pH 10.663

Chemical formula: Calcium Hydroxide and Phosphoric Acid

Ca(OH)2 and H3PO4

We said that acids were any chemical that increased ____ in water, and bases were any chemical that increases ____ in water. What definition is this?

H+, OH-, Arrhenius

Give 2 acid-base pairs and each theory that can be applied: NH3 + H2O -> NH4^+1 + OH^-1

H2O (A), OH^-1 (CB) and NH3 (B), NH4^+1 (CA); Arrhenius, Bronsted-Lowry

Chemical formula: Sulfurous Acid and Nitric Acid

H2SO3 and HNO3

Give 2 acid-base pairs and each theory that can be applied: HBr + H2O -> H3O^+1 + Br^-1

HBr (A), Br^-1 (CB) and H2O (B), H3O^+1 (CA); Arrhenius, Bronsted-Lowry

Chemical formula: Perchloric Acid and Aluminum Hydroxide

HClO4 and AL(OH)3

Give 2 acid-base pairs and each theory that can be applied: HI + H2O -> H3O^+1 + I^-1

HI (A), I^-1 (CB) and H2O (B), H3O^+1 (CA); Bronsted-Lowry

Give 2 acid-base pairs and each theory that can be applied: HI + KOH -> KI + H2O

HI (A), KI (CB) and KOH (B), H2O (CA); Bronsted-Lowry

Chemical formula: Ammonia and Hydrobromic Acid

NH3 and HBr

Which of the following solutions would contain the highest concentration of OH- ions if 1 mol of each was dissolved in water: H2SO4, NH4Cl, KNO3, NaOH?

NaOH

Name the acid/base: CH3COOH

acetic acid

Indicate acid, base, or both: Has pH of 3

acid

Indicate acid, base, or both: Reacts with zinc to produce hydrogen

acid

Indicate acid, base, or both: Tastes sour

acid

Indicate acid, base, or both: Turns litmus paper red

acid

Indicate acid, base, or both: Turns pink with phenolphthalein

acid

If the pH is 4.5, give: acid/base, pOH, H+, OH-

acid, pOH 9.5, 3.2 x 10^5 H+, 3.2 x 10^-10 OH-

Name the acid/base: NH3

ammonia

Indicate acid, base, or both: Feels slippery

base

Indicate acid, base, or both: Produced when sodium reacts with water

base

Indicate acid, base, or both: Tastes bitter

base

If there is 8.9 x 10^-5 M OH-, give: acid/base, pH, pOH, H+

base, pH 10, pOH 4, 1.1 x 10^-10 H+

If the pOH is 3.8 give: acid/ base, pH, H+, OH-

base, pH 10.2, 6.3 x 10^-11 H+, 1.6 x 10^-4 OH-

If there is 2.4 x 10^-12 M H+, give: acid/base, pH, pOH, OH-

base, pH 11.6, pOH 2.4, 4.2 x 10^-3 OH-

In addition we learned that substances that shares electrons are ____ and substances that accept ____ are acids. What definition is this?

bases, electron pairs, Lewis

What are the three properties of a base?

bitter taste, slippery feel, change litmus indicator blue

Indicate acid, base, or both: Is a good conductor

both

As the H3O+ ion concentration of a solution increases, what happens to the pH?

decreases

Name the acid/base: HCl

hydrochloric acid

Name the acid/base: HClO

hypochlorous acid

Name the acid/base: Mg(OH)2

magnesium hydroxide

Name the acid/base: HNO2

nitrous acid

Give pH and classification: [OH-] 9.8 x 10^-11

pH 10.01, base

Give pH and classification: 6.0 x 10^-3 M Ba(OH)2

pH 11.78, acidic

Give the pH: Thymol Blue (Orange), Phenolphthalein (Clear), Methyl Red (Red), Phenol Red (Yellow)

pH 2 or pH 3

Give the pH: Methyl Orange (Yellow), Phenolphthalein (Clear), Indigo Carmine (Blue), Bromocresol Green (Green)

pH 5

Give pH and classification: 3.5 x 10^-6 M H3P

pH 5.46, acidic

Give the pH: Methyl Orange (Yellow), Phenol Red (Pink), Bromocresol Green (Blue), Phenolphthalein (Clear)

pH 7

Give pH and classification: [H+] 1.0 x 10^-7

pH 7, neutral

Give pH and classification: [H+] 2.5 x 10^-9

pH 8.61, basic

Give the pH: Methyl Red (Yellow), Phenol Red (Pink), Indigo Carmine (Blue), Thymol Blue (Blue)

pH 9

As 0.1 M HCL is added to 0.1 KOH, what happens to the pH of the basic solution? Does the basicity or the acidity decrease?

pH decrease and basicity decreases

Name the acid/base: KOH

potassium hydroxide

We also learned that substances that transfer _____ are acids and substances that accept them are bases. What definition is this?

protons, Bronsted-Lowry

What is produced by a neutralization reaction?

salt and water

What are the three properties of an acid?

sour taste, change litmus indicator red or pink, reacts with metals (in single displacement) to produce H2 and with hydroxides (bases) in neutralization to produce H2O

Name the acid/base: H2SO4

sulfuric acid

The pH of an aqueous solution of sodium hydroxide is 12.9. What is the molarity of the solution?

10^-1.1 = 0.08 M

Write a balanced chemical reaction for calcium metal in hydrofluoric acid

2HF + Ca -> CaF2 + H2

What is the PH of pure water?

7.0