Spring Chemistry Final

Le Chatelier's Principle, pH, & Ocean Acidification

100

What did the ocean do to balance increased CO₂ in the atmosphere?

- Direct dissolving

- Chemical buffering

- Carbonic Acid

200

What does CO₂ dissolved in H₂O make and what can this substance do in the ocean?

- Dissolves into carbonic acid

- Substance drives ocean acidification

300

CH₄ (g) + H₂S (g) <> CS₂ (g) + 4H₂ (g) H = -285kJ

Solve w/ Equilibrium shift + concentration when there's an increase in CH₄

^CH₄ = ----->   H₂S = down  CS₂ = up   H₂ = up

            <---

400

CH₄ (g) + H₂S (g) <> CS₂ (g) + 4H₂ (g) H = -285kJ

Solve equilibrium shift + other elements with an increase of Pressure

ES = --->     CH₄= up  H₂S = up  CS₂ = d H₂= d

     <--------

500

CH₄ (g) + H₂S (g) <> CS₂ (g) + 4H₂ (g) H = -285kJ

Solve by finding equilibrium shift + other elements w/ a decrease in temperature WITH KEQ

ES = ------>  CH₄ = d  H₂S = d  CS₂ = up  H₂ = up

        <---

K_eq = up

Acids & Bases, Chemical Equilibrium, & Conjugate Acid Base Pairs

100

HCl (aq) + NH₃ (aq) <> NH₄⁺¹ (aq) + Cl^-1 (aq)

Label this equation using BLB, BLA, CA, & CB

HCl = BLA

NH₃ = BLB

NH₄⁺¹ = CA

Cl^-1 = CB

200

How do you determine which substances are the Conjugate Acid and the Conjugate Base? Which side of the equation are these on?

CA = Pairs w/ BLB

CB = Pairs w/ BLA

They are on the right side

300

How do you determine which substance is the Acid and the Base? Which side of the equation are these on?

Acid --> BLA = loses H

Base --> BLB = gains H

They are always on the left side

400

What does K_eq mean?

Shows how much CR favors product formation

500

Calculate [OH^-1] in an aqueous solution at 25 C with 1.0 x 10^-12 M H⁺¹

Determine the Solution type

1.0x10^-2M

Basic

Stoichiometry

100

How many Turkey sandwiches can you make based on the Limiting Reaction?

In Your Fridge: 28 Bread, 40 Turkey, 36 Cheese, 32 Tomatoes

Recipe: 2 bread, 4 Turkey, 2 cheese, 4 tomatoes

8 Turkey sandwiches

200

Calculate the Molarity of Solution prepared by dissolving 79.368 g InPO₄ in enough water to make 40.85 L of Solution.

0.093

300

Calculate #mol O₂ needed when 8.62 mol H₂O are produced.

2C₄H₁₀ (g) + 13O₂ (g) ----> 8CO₂ (g) +  10H₂O (g)

11.2 mol O₂

400

We have 96.12 g C₃H_8. How many moles of CO₂ are produced?

C₃H₈ (g) + 5O₂ (g) ----> 3CO₂ (g) + 4H₂O (g)

6.537

500

Calculate the #g O₂ needed if 8.35 x 10²⁶ molecules CO₂ form.

C₃H₈ (g) + 50₂ (g) ----> 3CO₂ (g) + 4H₂O (g)

= 7.40*10⁴g O₂

Chemical Reactions

100

Calculate MM for Ru(MnO₄)₄ = Ruthenium (II) Permanganate

576.83

200

Balance CE by writing Coefficients to ensure there are the same number of atoms of each element on BOTH sides of the CE.

Ba (s) + Al₂(SO₄)₃ (aq) ----> ?

3Ba SO₄ (aq) + 2Al (s)

300

What is a Combustion reaction?

Involves the burning of Hydrocarbon in Oxygen

400

What is a decomposition reaction?

One reactant breaks down to separate into 2+ Products

500

Balance this Chemical equation.

__N₂(g) + __H₂(g) ----> __NH₃ (g)

3, 2

Intermolecular Forces, Names, & Chemical Formulas

100

Why do most materials have no overall charge?

They have equal numbers of protons and electrons.

200

Why are London Dispersion Forces (LDF) temporary?

Due to the constant motion in atoms.

300

What is the ionic compounds name of this:

Ca (CrO₄)₄

Calcium Chromate

400

What is the ionic compound?

Trinitrogen Pentachloride

N₃Cl₅

500

What is the ionic compound?

Carbon Tetrafluoride

CF₄