Q: What is the net ionic equation for the reaction between HCl and NaOH in aqueous solution?

$$\text{H}^+ (aq) + \text{OH}^- (aq) \rightarrow \text{H}_2\text{O} (l)$$

Q: What is the wavelength of light with a frequency of $$6.0 \times 10$$^{14}$$\ \text{s}^{-1}$$? (Use $$c = 3.0 \times 10^8$\ \text{m/s})$$

$$5.0 \times 10$$^{-7}$$\ \text{m}$$

Q: What is the energy of a photon with a wavelength of $$500\ \text{nm}$$? (Use $$h = 6.626 \times 10$$^{-34}$$\ \text{J} \cdot \text{s}$$ and $$c = 3.0 \times 10^8$\ \text{m/s})$$

$$3.98 \times 10$$^{-19}$$\ \text{J}$$

Question 1

Which of the following compounds will form a precipitate when mixed with a solution of NaCl, according to the solubility guidelines provided?

Accepted Answer

Pb(NO$$_3$$)$$_2$$

Question 2

Which of the following is a strong electrolyte in aqueous solution?

Accepted Answer

NaCl

Question 3

What is the net ionic equation for the reaction between HCl and NaOH in aqueous solution?

Accepted Answer

$$	ext{H}^+ (aq) + 	ext{OH}^- (aq) ightarrow 	ext{H}_2	ext{O} (l)$$

Question 4

Which of the following ions is a spectator ion in the reaction between AgNO$$_3$$ and NaCl?

Accepted Answer

Na$$^+$$

Question 5

A solution is prepared by dissolving 0.50 mol of Na$$_2SO$_4 in $$enough water to make 1.0 L of solution. What is the concentration of Na$$^+$$ ions?

Accepted Answer

$$1.0\ 	ext{M}$$

Question 6

Which of the following is NOT a strong acid?

Accepted Answer

CH$$_3$$COOH

Question 7

What is the oxidation number of sulfur in SO$$_4$$^{2-}$$?

Accepted Answer

$$+6$$

Question 8

Which compound is insoluble in water according to the solubility guidelines?

Accepted Answer

BaSO$$_4$$

Question 9

A 250 mL sample of 0.20 M NaCl is diluted to 500 mL. What is the new concentration?

Accepted Answer

$$0.10\ 	ext{M}$$

Question 10

Which of the following best describes a redox reaction?

Accepted Answer

A reaction where electrons are transferred between species

Question 11

What is the wavelength of light with a frequency of $$6.0 	imes 10$$^{14}$$\ 	ext{s}^{-1}$$? (Use $$c = 3.0 	imes 10^8$\ 	ext{m/s})$$

Accepted Answer

$$5.0 	imes 10$$^{-7}$$\ 	ext{m}$$

Question 12

Which region of the electromagnetic spectrum has the highest energy?

Accepted Answer

Gamma rays

Question 13

What is the energy of a photon with a wavelength of $$500\ 	ext{nm}$$? (Use $$h = 6.626 	imes 10$$^{-34}$$\ 	ext{J} \cdot 	ext{s}$$ and $$c = 3.0 	imes 10^8$\ 	ext{m/s})$$

Accepted Answer

$$3.98 	imes 10$$^{-19}$$\ 	ext{J}$$

Question 14

According to the Bohr model, what happens when an electron moves from $$n=3 to$$ $$n=2$$?

Accepted Answer

The atom emits energy

Question 15

Which quantum number determines the shape of an orbital?

Accepted Answer

l

Question 16

For the quantum numbers $$n=3$$ and $$l=1$$, what are the possible values of $$m_l$$?

Accepted Answer

$$-1, 0, +1$$

Question 17

Which of the following electron configurations is correct for magnesium (Mg)?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^6$$\ $$3s^2$$

Question 18

How many electrons can a d orbital hold?

Accepted Answer

10

Question 19

Which rule states that electrons fill degenerate orbitals singly before pairing?

Accepted Answer

Hund's Rule

Question 20

What are the possible values for the fourth quantum number $$m_s$$?

Accepted Answer

$$-1/2, +1/2$$

Exam 2 Study Guide: Reactions in Aqueous Solution & Electronic Structure of Atoms

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