7.3, 7.4, & Chapter 8 Flashcards

1
Q

Will the compound FeCl3 dissolve in water? How can you tell?

A

Yes. Looking at the solubility chart on the periodic table, iron(III) chloride shows (aq), meaning that putting the compound in water results in an aqueous solution of it - it dissolves in water.

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2
Q

A solid that is produced as a result of a chemical reaction in solution and that separates from the solution.

A

Precipitate

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3
Q

Will the following reaction proceed as written? Explain.

Ca + Cu(NO3)2 –> Cu + Ca(NO3)2

A

Yes. Since calcium is above copper in the activity series, it will replace it.

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4
Q

A list of elements organized according to the ease with which the elements undergo certain chemical reactions.

A

Activity Series

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4
Q

Will the following reaction proceed as written? Explain.

AgBr + I2 –> AgI + Br2

A

No. Since the halogen iodine is below the halogen bromine on the periodic table, it is less active and will not replace it.

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5
Q

Will the compound MgO dissolve in water? How can you tell?

A

No. Looking at the solubility chart on the periodic table, magnesium oxide shows (s), meaning that, when placed in water, the compound remains solid - it does not dissolve.

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5
Q

Show the net ionic equation for the following reaction. You must first predict the products, balance the equation, and determine the solubilty of the products.

K2S (aq) + Zn(NO3)2 (aq) –>

A
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6
Q

A reaction in which a single compound produces two or more simpler substances:

AB –> A + B

ONLY ONE REACTANT

A

Decomposition Reaction

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7
Q

The seven diatomic elements are… (the mnemomic device is Have No Fear Of Ice Cold Beverages)

A

H2, N2, O2, F2, Cl2, Br2, I2

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8
Q

The separation of ions that occurs when an ionic compound dissolves.

A

Dissociation

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9
Q

Ions that do not take part in a chemical reaction and are found in solution both before and after the reaction.

A

Spectator ions

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9
Q

When balancing chemical equations, the only things that may be changed are the…

A

Coefficients

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10
Q

The symbols written after a substance in a chemical equation to indicate solid, liquid, gas, or aqueous, respectively.

A

(s), (l), (g), (aq)

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10
Q

When a solid is dissolved in water, it is this type of solution.

A

Aqueous

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12
Q

A chemical reaction in which the products re-form the original reactants.

A

A reversible reaction

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14
Q

States that atoms are neither created nor destroyed in a chemical reaction; they are only rearranged.

A

The Law of Conservation of Mass

15
Q

A small whole number that appears in front of a formula in a chemical equation.

A

A coefficient

16
Q

A reaction in which a substance combines with oxygen, releasing a large amount of energy.

When involving a hydrocarbon, the products are always carbon dioxide and water:

CxHy +O2 –> CO2 + H2O

A

Combustion Reaction

17
Q

The symbol shown here means…

A

Heat is added to drive a reaction

18
Q

What type of reaction is shown below? Predict the products and then balance.

Cd(s) + AgC2H3O2(aq) –>

A

Single Displacement

Cd(s) + 2AgC2H3O2(aq) –>2Ag(s) + Cd(C2H3O2)2(aq)

20
Q

A reaction in which one element replaces a similar element in a compound.

A + BC –> B + AC

A

Single Replacement

21
Q

What type of reaction is shown below? Predict the products and then balance.

Na2SO4(aq) + Ba(NO3)2(aq) –>

A

Double Displacement

Na2SO4(aq) + Ba(NO3)2(aq) –> 2NaNO3(aq) + BaSO4(s)

22
Q

Uses symbols and formulas to represent the identities and relative molecular or molar amounts of the reactants and products in a chemical reaction.

A

Chemical equation

23
Q

What type of reaction is shown below? Predict the products and then balance.

C10H22(s) + O2(g) –>

A

Combustion

2C10H22(s) + 31O2(g) –> 20CO2(g) + 22H2O(g)

24
Q

The symbol shown here means…

A

A reversible reaction.

25
Q

What type of reaction is shown below? Predict the products and then balance.

Ag2O(s) –>

A

Decomposition

2Ag2O(s) –> 4Ag(s) +O2(g)

26
Q

A reaction in which two or more substances combine to form a new compound.

A + B –> AB

ONLY ONE PRODUCT

A

Synthesis Reaction

27
Q

A chemical equation is balanced when…

A

The same number of atoms appear on both sides of the arrow.

29
Q

A substance that changes the rate of a chemical reaction but can be recovered unchanged.

A

Catalyst

30
Q

What type of reaction is shown below? Predict the products and then balance.

Na(s) + F2(g) –>

A

Synthesis

2Na(s) + F2(g) –> 2NaF(s)

31
Q

An equation that includes only those compounds and ions that undergo a chemical change in a reaction in aqueous solution.

A

Net ionic equation

32
Q

Four easily observed changes that usually indicate a chemical reaction has occurred.

A
  1. Color Change
  2. Release/Absorption of energy (usually heat)
  3. Production of a gas
  4. Formation of a precipitate
33
Q

A reaction in which the ions of two compounds exchange places in an aqueous solution to form two new compounds.

AB + CD –> AD + CB

A

Double Displacement

34
Q

The symbol shown here means…

A

A catalyst was used to speed up the reaction (specifically platinum in this case, but could be other substances).

35
Q

The → symbol means…

A

Yields

36
Q

The suggested steps for balancing equations are…

A
  1. Balance atoms that appear only once on either side of the arrow first
  2. Balance everything except hydrogen and oxygen
  3. Balance hydrogen
  4. Balance oxygen
37
Q

Tetracycline is an antibiotic used in the treatment of acne and rosacea. The compound is 59.46% carbon, 5.44% hydrogen, 6.30% nitrogen, and 28.80% oxygen. Calculate the empirical formula of this compound.

In a separate experiment, the molecular mass of tetracycline was determined to be 444.432u. What is its molecular formula?

A
38
Q

A certain compound consists only of sulfur and nitrogen. The mass composition for this compound was found to be 69.6% sulfur and the remainder nitrogen. What is the empirical formula of this compound?

If the molecular mass of the compound was found to be 184.32u, what is its molecular formula?

A
39
Q

When taking x-rays of the upper gastrointestinal tract, a patient is given a barium swallow as a contrast medium. The suspension of barium sulfate coats the upper GI tract with barium, enhancing its visibility on the x-ray. What is the mass composition of each element in barium sulfate, to two decimal places?

A