Exam 8: Water Everywhere: A Most Precious Resource

A student wants to prepare exactly 250 mL of a 0.500 M aqueous potassium hydroxide solution.What mass of potassium hydroxide (molar mass = 56.10 g/mol) must the student dissolve in the 250 mL of solution?

(Multiple Choice)

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Question 41

Why is water a liquid a room temperature instead of a gas?

(Multiple Choice)

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Question 42

Bases produce which ions in aqueous solution?

(Multiple Choice)

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Question 43

The drawing shows a simple way of purifying salt water.What is this process called?

(Multiple Choice)

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Question 44

If the lead concentration in water is 1 ppm,then we should be able to recover 1 mg of lead from _____ L of water.

(Multiple Choice)

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Question 45

An acidic fog in Pasadena was found to have a pH of 2.50.Which expression represents this pH measurement?

(Multiple Choice)

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Question 46

At water treatment plants aluminum sulfate and calcium hydroxide are added to

(Multiple Choice)

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Question 47

What is the concentration of hydroxide ions in an aqueous solution containing [H⁺] = 1 x 10^-5 M?

(Multiple Choice)

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Question 48

We cannot effectively clean nonpolar substances from our hands or clothing with water alone;we must add soap or detergent.The structure of a typical soap molecule is shown below.Which region of this molecule would dissolve in a nonpolar substance such as grease?

(Multiple Choice)

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Question 49

In general,hydrogen bonds are

(Multiple Choice)

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Question 50

Which shows the Lewis structure of water with the correct partial charges and nonbonding electrons?

(Multiple Choice)

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Question 51

How many moles of sodium chloride are there in 250 mL of a 1.20 M sodium chloride solution?

(Multiple Choice)

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Question 52

Which molecule(s) contain(s) polar covalent bonds,but is(are) nonpolar?

(Multiple Choice)

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Question 53

Mixing which of the following will produce a precipitation reaction (give an insoluble product)?

(Multiple Choice)

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Question 54

The main reason that water supplies are chlorinated is

(Multiple Choice)

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Question 55

Which chemical equation shows the dissociation of two protons from trihydrogen phosphate (phosphoric acid)?

(Multiple Choice)

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Question 56

The attractions between anions and cations throughout a crystal are known collectively as

(Multiple Choice)

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Question 57

Which compound should be the most soluble in water?

(Multiple Choice)

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Question 58

Which substance has the highest pH?

(Multiple Choice)

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Question 59

How many joules are required to heat 2.0 L of water from 20^$\circ$C to its boiling point of 100^$\circ$C? The specific heat of water is 4.18 J/g.^$\circ$C and the density of water is 1 g/mL.

(Multiple Choice)

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Question 60

Showing 41 - 60 of 79

A student wants to prepare exactly 250 mL of a 0.500 M aqueous potassium hydroxide solution.What mass of potassium hydroxide (molar mass = 56.10 g/mol) must the student dissolve in the 250 mL of solution?

Why is water a liquid a room temperature instead of a gas?

Bases produce which ions in aqueous solution?

The drawing shows a simple way of purifying salt water.What is this process called?

If the lead concentration in water is 1 ppm,then we should be able to recover 1 mg of lead from _____ L of water.

An acidic fog in Pasadena was found to have a pH of 2.50.Which expression represents this pH measurement?

At water treatment plants aluminum sulfate and calcium hydroxide are added to

What is the concentration of hydroxide ions in an aqueous solution containing [H⁺] = 1 x 10^-5 M?

We cannot effectively clean nonpolar substances from our hands or clothing with water alone;we must add soap or detergent.The structure of a typical soap molecule is shown below.Which region of this molecule would dissolve in a nonpolar substance such as grease?

In general,hydrogen bonds are

Which shows the Lewis structure of water with the correct partial charges and nonbonding electrons?

How many moles of sodium chloride are there in 250 mL of a 1.20 M sodium chloride solution?

Which molecule(s) contain(s) polar covalent bonds,but is(are) nonpolar?

Mixing which of the following will produce a precipitation reaction (give an insoluble product)?

The main reason that water supplies are chlorinated is

Which chemical equation shows the dissociation of two protons from trihydrogen phosphate (phosphoric acid)?

The attractions between anions and cations throughout a crystal are known collectively as

Which compound should be the most soluble in water?

Which substance has the highest pH?

How many joules are required to heat 2.0 L of water from 20^$\circ$C to its boiling point of 100^$\circ$C? The specific heat of water is 4.18 J/g.^$\circ$C and the density of water is 1 g/mL.

Portable Electronics: the Periodic Table in the Palm of Your Hand

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Exam 8: Water Everywhere: A Most Precious Resource

A student wants to prepare exactly 250 mL of a 0.500 M aqueous potassium hydroxide solution.What mass of potassium hydroxide (molar mass = 56.10 g/mol) must the student dissolve in the 250 mL of solution?

Why is water a liquid a room temperature instead of a gas?

Bases produce which ions in aqueous solution?

The drawing shows a simple way of purifying salt water.What is this process called?

If the lead concentration in water is 1 ppm,then we should be able to recover 1 mg of lead from _____ L of water.

An acidic fog in Pasadena was found to have a pH of 2.50.Which expression represents this pH measurement?

At water treatment plants aluminum sulfate and calcium hydroxide are added to

What is the concentration of hydroxide ions in an aqueous solution containing [H+] = 1 x 10-5 M?

We cannot effectively clean nonpolar substances from our hands or clothing with water alone;we must add soap or detergent.The structure of a typical soap molecule is shown below.Which region of this molecule would dissolve in a nonpolar substance such as grease?

In general,hydrogen bonds are

Which shows the Lewis structure of water with the correct partial charges and nonbonding electrons?

How many moles of sodium chloride are there in 250 mL of a 1.20 M sodium chloride solution?

Which molecule(s) contain(s) polar covalent bonds,but is(are) nonpolar?

Mixing which of the following will produce a precipitation reaction (give an insoluble product)?

The main reason that water supplies are chlorinated is

Which chemical equation shows the dissociation of two protons from trihydrogen phosphate (phosphoric acid)?

The attractions between anions and cations throughout a crystal are known collectively as

Which compound should be the most soluble in water?

Which substance has the highest pH?

How many joules are required to heat 2.0 L of water from 20 ∘\circ∘ C to its boiling point of 100 ∘\circ∘ C? The specific heat of water is 4.18 J/g. ∘\circ∘ C and the density of water is 1 g/mL.

Portable Electronics: the Periodic Table in the Palm of Your Hand

The Air We Breathe

Radiation From the Sun

Climate Change

Energy From Combustion

Energy From Alternative Sources

Energy Storage

The World of Polymers and Plastics

Brewing and Chewing

Nutrition

Health Medicine

Genes and Life

Who Killed Drthompson a Forensic Mystery

Filters

What is the concentration of hydroxide ions in an aqueous solution containing [H⁺] = 1 x 10^-5 M?

How many joules are required to heat 2.0 L of water from 20^$\circ$C to its boiling point of 100^$\circ$C? The specific heat of water is 4.18 J/g.^$\circ$C and the density of water is 1 g/mL.