Palomar College Physical Properties and Recrystallization Quiz Questions

Help me study for my Chemistry class. I’m stuck and don’t understand.

please I attached all question in the file Homework 16 question

Question 1

Crystals are made when a substance has atoms or molecules that form in a very organized, repeating, what kind of pattern?

one-dimensional pattern

none of the above

three-dimensional pattern

two-dimensional pattern

Question 2

Please read more about unsaturated, saturated, and supersaturated solutions on this ChemLibre site (Links to an external site.) and answer the following questions.

Types of Solutions:

  • unsaturated
  • saturated
  • supersaturated
  • A [“”, “”, “”, “”] [ Select ]
    Supersaturated Solution
    Unsaturated Solution
    Hydrated solution
    Saturated Solution solution has solid that completely dissolves, leaving no remaining substances
  • A [“”, “”, “”, “”] [ Select ]
    Hydrated solution
    Saturated Solution
    Unsaturated Solution
    Supersaturated Solution solution has solid that dissolves until it is unable to dissolve anymore, leaving the undissolved substances at the bottom
  • A [“”, “”, “”, “”] [ Select ]
    Hydrated solution
    Saturated Solution
    Supersaturated Solution
    Unsaturated Solution solution contains more undissolved solute than the saturated solution because of its tendency to crystallize and precipitate.
  • The solution you will be making in this lab is a [“”, “”, “”, “”] [ Select ]
    Saturated Solution
    Hydrated solution
    Supersaturated Solution
    Unsaturated Solution solution.

Question 3

Please watch the video (up to minute 1:45) below and answer the following questions:

  • What is required to make a supersaturated solution? [“”, “”, “”, “”] [ Select ]
    increase in pH
    increase in temperature
    decrease in temperature
    decrease in pH
  • What causes immediate precipitation after a supersaturated solution is made? [“”, “”, “”, “”] [ Select ]
    increase in heat
    immediate disturbance
    increase in pH
    decrease in pH

Question 4

For this @Home lab, identify the solute and solvent that make up the solution.

Solute = [“”, “”, “”, “”] [ Select ]

water

borax

Solvent = [“”, “”] [ Select ]
water
borax

Question 5

Solubility often increases with temperature, so you may be able to get more solute into a hot solvent than you would if the solvent was cool.

Therefore, you can dissolve much more sugar in [“”, “”] [ Select ]
hot
cold water than you can in [“”, “”] [ Select ]
hot
cold water.

Question 6

Given the following scenarios, state whether the end solution is saturated, unsaturated, or supersaturated.

  • You’ve add solute to a liquid that dissolves easily. No solid is found at the bottom of the jar. The solution is [“”, “”, “”] [ Select ]
    saturated
    supersaturated
    unsaturated
  • You’ve add solute to a liquid until no more will dissolve. Some solid is remaining at the bottom of the jar. The solution is [“”, “”, “”] [ Select ]
    saturated
    supersaturated
    unsaturated
  • You add heat to the above solution, and the no solid is remaining at the bottom of the jar. The solution is [“”, “”, “”] [ Select ]
    saturated
    unsaturated
    supersaturated

Question 7

Using your knowledge of ionic bonding, answer the question:

How many electrons are transferred between sodium and fluoride in a single formula unit?

(think of the number of electrons involved in all atoms involved in a single formula unit of the ionic bond)

Question 8

Using your knowledge of ionic bonding, answer the question:

How many electrons are transferred between magnesium and chloride in a single formula unit?

(think of the number of electrons involved in all atoms involved in a single formula unit of the ionic bond)

Question 9

Ionic compounds have a net charge of:

Question 10

What is the name of Pb(NO3)2?

Group of answer choices

Lead (II) nitrate

Lead nitrate

Lead (II) nitride

None of the above

Question 11

What is the name of FeCl3?

Group of answer choices

Iron (II) chloride

Iron chloride

Iron (III) chloride

None of the above

Question 12

What is the name of NH4NO2?

Group of answer choices

Ammonium nitride

Ammonium nitrite

Ammonium nitrate

None of the above

Question 13

What is the name of CO2?

Group of answer choices

Monocarbon dioxide

Carbon dioxide

Carbon oxide

None of the above

Question 14

What is the name of Ag3CO3?

Group of answer choices

None of the above

Silver (I) carbonate

Silver carbon trioxide

Silver carbonate

Question 15

Boron is considered to be a [“”, “”, “”, “”] [ Select ]

Nonmetal
Metal
Semi-metal .

Carbon is considered to be a [“”, “”, “”] [ Select ]
Nonmetal
Metal
Semi-metal .

Question 16

Classify elements in the periodic table as either metal, nonmetal, or semimetal:

Magnesium is considered a [“”, “”, “”] [ Select ]
nonmetal
metal
semimetal .

Nickel is considered a [“”, “”, “”] [ Select ]
semimetal
nonmetal
metal .

Chlorine is considered a [“”, “”, “”] [ Select ]
nonmetal
semimetal
metal .

Aluminum is considered a [“”, “”, “”] [ Select ]
nonmetal
metal
semimetal .

Prof. Angela

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