HM 1100 Wk 5 General Chemistry Questions

 

 

Practice questions week 5

Question 1

Plants undergo photosynthesis in order to provide oxygen into the air, which is vital for the human body to stay alive: 6 CO2 + 6 H2O + light C6H12O6 + 6 O2 If there were 2.38 x 102 g of H2O and 18.6 moles of CO2, how much C6H12O6 can be produced?

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Top of Form    Question 2

If a solution contained a substance of 4.67kg (molar mass of 34.6 g/mol) in 350mL, what is the molarity of the solution?

Bottom of Form           Top of Form    Question 3

Describe the differences between Bronsted acids and bases v. Lewis acids and bases.

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You have plenty of salts that are in front of you and you are trying to figure out which salts are soluble in water, and which ones of their products are soluble in water. For the following equation, provide the net ionic equation. KI+ Pb(NO3)2

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Consider this reaction: 6 CO2 + 6 H2O + light

eq_119052.gif

C6H12O6 + 6 O2

If you actually produced 30g of C6H12O6 what would be the percent yield?

Calculate the theoretical yield from having 2.38 x 102 g of H2O, 18.6 moles of CO2.

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You have 13.2 mols of CO2 . Calculate the mass of CO2.

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Consider this reaction: 6 CO2 + 6 H2O + light C6H12O6 + 6 O2

If there were 2.38 x 102 g of H2O, 18.6 moles of CO2, and plenty of light, which reactant would be the limiting reactant?

Bottom of Form           Top of Form    Question 8

For the following reactions, calculate the ionization constant of each reaction. CH3COOH (aq) + H2O (l) H3O+ (aq) + CH3COO-(aq); [CH3COOH] = 0.8M, [H3O+] = 7.6M, [CH3COO-] = 16.4MKa =

If you wanted to dilute the 3M NaOH solution to 500mL of 1M NaOH solution, how much L of the 3M NaOH solution would you need?

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Consider this reaction: 6 CO2 + 6 H2O + light C6H12O6 + 6 O2

If there were 2.38 x 102 g of H2O, 18.6 moles of CO2, and plenty of light, what would be the theoretical yield of the reaction?

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How many mols of a 3M NaOH solution are in 1L of the solution?

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For the following reactions, calculate the ionization constant of each reaction. HCl (aq) + H2O (l) H3O+ (aq) + Cl- (aq); [HCl] = 16.9M, [H3O+] = 13.3M, [Cl-] = 7.4MKa =

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Help Asha identify whether the reaction is a synthesis or decomposition reaction: PCl5PCl3 + Cl2

Synthesis

Decomposition    Bottom of Form           Top of Form    Question 14

Help Asha identify whether the reaction is a synthesis or decomposition reaction: 2 HCl H2 + Cl2

Synthesis

Decomposition    Bottom of Form           Top of Form    Question 15

Identify if the following reaction is balanced or not balanced: CuSO4 + 2 NaOH Na2SO4 + Cu(OH)2

Balanced

Not Balanced    Bottom of Form           Top of Form    Question 16

Identify if the following reaction is balanced or not balanced: 2 HCl + CaCO3CaCl2 + H2O + CO2

Balanced

Not Balanced    Bottom of Form           Top of Form    Question 17

You have plenty of salts that are in front of you and you are trying to figure out which salts are soluble in water, and which ones of their products are soluble in water. For the following equation, identify the potential products. CsClO3+ RbNO3

Bottom of Form           Top of Form    Question 18

You have plenty of salts that are in front of you and you are trying to figure out which salts are soluble in water, and which ones of their products are soluble in water. For the following equation, identify the potential products. KI+ Pb(NO3)2

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You have plenty of salts that are in front of you and you are trying to figure out which salts are soluble in water, and which ones of their products are soluble in water. For the following equation, provide the molecular equation. KI+ Pb(NO3)2

Bottom of Form           Top of Form    Question 20

You have plenty of salts that are in front of you and you are trying to figure out which salts are soluble in water, and which ones of their products are soluble in water. For the following equation, provide the molecular equation. H2SO4+ Ba(OH)2

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You have plenty of salts that are in front of you and you are trying to figure out which salts are soluble in water, and which ones of their products are soluble in water. For the following equation, identify which reactants and products are soluble/insoluble in water. KI+ Pb(NO3)2

Bottom of Form           Top of Form    Question 22

You have plenty of salts that are in front of you and you are trying to figure out which salts are soluble in water, and which ones of their products are soluble in water. For the following equation, identify which reactants and products are soluble/insoluble in water. CsClO3+ RbNO3

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Identify if the following molecule is a strong acid, strong base, weak acid or a weak base. Hydrogen sulfide

Strong acid

Strong base

Weak acid

Weak base    Bottom of Form           Top of Form    Question 24

Identify if the following molecule is a strong acid, strong base, weak acid or a weak base. Barium hydroxide

Strong acid

Strong base

Weak acid

Weak base    Bottom of Form           Top of Form    Question 25

Identify if the following molecule is a strong acid, strong base, weak acid or a weak base. Chloric acid

Strong acid

Strong base

Weak acid

Weak base    Bottom of Form           Top of Form    Question 26

Identify if the following substance has high, low, or neutral pH: Water

High pH

Low pH

Neutral    Bottom of Form           Top of Form    Question 27

Identify if the following substance has high, low, or neutral pH: Stomach acid

High pH

Low pH

Neutral    Bottom of Form           Top of Form    Question 28

Calculate the pH for the following concentration: [H3O+] = 5.77 x 10-7 M

pH = 6.2

pH = 6.5

pH = 6.0

pH = 5.2    Bottom of Form           Top of Form    Question 29

Calculate the pH for the following concentration: [H3O+] = 10.33 x 10-9 M

pH = 8.0

pH = 9.0

pH = 8.3

pH = 8.5    Bottom of Form           Top of Form    Question 30

Calculate the concentration for the following pH: pH = 9.45

[H3O+] = 3.5 x 10-10 M

[H3O+] = 3.5 x 10-8 M

[H3O+] = 3.0 x 10-10 M

[H3O+] = 3.3 x 10-8 M    Bottom of Form           Top of Form    Question 31

Calculate the concentration for the following pH: pH = 4.52

[H3O+] = 3.0 x 10-5 M

[H3O+] = 3.0 x 10-9 M

[H3O+] = 2.0 x 10-5 M

[H3O+] = 3.5 x 10-5 M    Bottom of Form           Top of Form    Question 32

What is the pH of a solution that has a pKa = 6.4, conjugate base concentration = 0.024M and acid concentration of 0.0012M?

• 8.1

7.7

6.4

9.0    Bottom of Form           Top of Form    Question 33

What happens when a strong base is added to a weak acid solution?

The weak acid gives up H+ ions

The hydroxide ion from the strong base is converted to water

All of the above    Bottom of Form           Top of Form    Question 34

Help Asha balance the following equation by completing the equation with the correct numbers:__HCl __H2 + __Cl2

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Help Asha balance the following equation by completing the equation with the correct numbers:__H2 + __O2 __H2O

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36.You have 13.2 mols of CO2. Calculate the mass of CO2