Chemistry Chapter 4 Homework Assignment

When the following reaction occurs: H3PO4(aq)+Ca(OH)2(aq)→ what is the formula for the salt formed? Express your answer as a chemical formula.

Ca3(PO4)2

Which of the following combinations of reactants could the diagram represent?

Pb2+(aq)+2I−(aq)→

Which of the following forms of oxygen can undergo disproportionation? Check all that apply.

peroxide ion superoxide ion

Indicate the oxidation number of oxygen for each compound in the following reaction: 2H2O2(aq)→ 2H2O(l)+O2(g) Select the choice that gives the oxidation numbers of H2O2, H2O(l), and O2(g), respectively.

−1, −2, 0

Classify the following reactions: A. HCl(aq)+NaOH(aq)→NaCl(aq)+H2O(l) B. Ba(OH)2(aq)+ZnCl2(aq)→BaCl2(aq)+Zn(OH)2(s) C. 2AgNO3(aq)+Mg(s)→Mg(NO3)2(aq)+2Ag(s) Drag the appropriate items to their respective bins.

precipitation B Acidbase A Oxidation reduction C

Classify the following reactions. A.HNO3(aq)+NH3(aq)→NH4NO3(aq) B. 2Cu(s)+O2(g)→2CuO(s) C. NaCl(aq)+AgNO3(aq)→NaNO3(aq)+AgCl(s) D. 2LiOH(aq)+H2SO4(aq)→Li2SO4(aq)+2H2O(l) E. CaCl2(aq)+K2CO3(aq)→2KCl(aq)+CaCO3(s) Drag the items to their respective bins.

redox B Neutralization A D Precipitation C E

Which of the following situations is most favorable for solubility?

strong attraction of solute particles to solvent particles

Classify each of the following binary compounds by the oxidation number of oxygen. Drag each item to the appropriate bin.

-2 K2O CaO CO2 -1 CaO2 K2O2 -1/2 KO2 0 O3 O2

What is the oxidation state of each individual carbon atom in C2O42−?

+3

What is the oxidation state of an individual carbon atom in CaCO3?

+4

What is the oxidation state of an individual nitrogen atom in HNO3?

+5

What is the oxidation state of an individual phosphorus atom in PO43−?

+5

Consider the reaction 2D2(g)+O2(g)→2D2O(l) What is the mass of heavy water, D2O(l), produced when 4.40 g of O2(g) reacts with excess D2(g)? Express your answer with the appropriate units.

5.50 g

1.36 g H2 is allowed to react with 10.0 g N2, producing 1.11 g NH3. Part A What is the theoretical yield for this reaction under the given conditions? Express your answer numerically in grams.

7.66g

Classify each of the following substances by the oxidation number of hydrogen. Drag each item to the appropriate bin.

-1 CaH2 MgH2 NaH 0 H2 +1 CH4 HCL H2O NH3

The student is told that one of the four solids tested is actually magnesium bromide,MgBr2. Which of the solids could be MgBr2? Check all that apply.

A 0.20 bright D 0.20 brught

A 0.100 M solution of K2SO4 would contain the same total ion concentration as which of the following solutions?

0.0750 MNa3PO4

If you had excess aluminum, how many moles of aluminum chloride could be produced from 19.0 g of chlorine gas, Cl2? Express your answer to three significant figures and include the appropriate units

0.179 mol

If you had excess chlorine, how many moles of of aluminum chloride could be produced from 14.0 g of aluminum? Express your answer to three significant figures and include the appropriate units.

0.519 mol

What is the percent yield for this reaction under the given conditions? Express the percentage numerically.

14.5%

Balance the given chemical equation using whole-number coefficients. ?D2(g)+?O2(g)→?D2O(l) Enter the coefficients in order separated by commas (e.g., 1,3,2, where 1 indicates the lack of a coefficient).

2,1,2

If 18.2 mL of 0.800 M HCl solution are needed to neutralize 5.00 mL of a household ammonia solution, what is the molar concentration of the ammonia? Express your answer with the appropriate units.

2.91 M

Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction: 2Al(s)+3Cl2(g)→2AlCl3(s) What is the maximum mass of aluminum chloride that can be formed when reacting 14.0 g of aluminum with 19.0 g of chlorine? Express your answer to three significant figures and include the appropriate units.

23.8g

Consider the reaction 2H2(g)+O2(g)→2H2O(l) What is the mass of water, H2O(l), produced when 4.40 g of O2(g) reacts with excess H2(g)? Express your answer with the appropriate units.

4.95 g

A student tests four solids for their ability to complete an electrical circuit when dissolved in water by observing their ability to close a circuit containing a light bulb and obtains the following results:

B 0.20 Dim

The electrical conductivities of the following 0.100 M solutions were measured in an apparatus that contained a light bulb as the indicator of conductivity. Rank the solutions in order of decreasing intensity (brightest to dimmest) of the light bulb. Rank from brightest to dimmest bulb. To rank items as equivalent, overlap them.

Brightest Al(NO3)3 KI HF CH3OH

Which of the following would you least expect to find in CaCl2(aq)?

CaCl2 molecules

The student is now told that the four solids, in no particular order, are magnesium bromide (MgBr2), sugar (C6H12O6), acetic acid (CH3COOH), and sodium bromide (NaBr). Assuming that conductivity is correlated to the number of ions in solution, rank the four substances based on how well a 0.20 M solution in water will conduct electricity. Rank from most conductive to least conductive. To rank items as equivalent, overlap them.

Most conductive magnesium bromide sodium bromide acetic acid sugar Least conductive

Watch the animation, then check off the samples that will conduct electricity. Check all that apply.

NaCl solution

Substance X is a molecular compound and is not an acid nor a base. Based just on this information, what can you determine about substance X?

X is not an electrolyte.

Which of the following reactions could be used to produce hydrogen gas?

Zn(s)+HCl(aq)→

What is the concentration of K+ ions in a 0.025 M K2CO3 solution assuming complete dissociation? Express the concentration in molarity.

concentration of K+ = 0.050 M