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:

https://www.youtube.com/watch?v=8Z_H0Tt_hqs&feature=youtu.be

• 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 .