How Substances Dissolve: Checking For Understanding Flash Quiz

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1. A general rule in chemistry is that "like dissolves like".  This rule means that_______________

Explanation

The correct answer explains that the general rule in chemistry, "like dissolves like," means that a solvent will dissolve substances that have similar molecular structures. This is because substances with similar molecular structures have similar intermolecular forces, allowing them to mix and dissolve in each other.

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About This Quiz
How Substances Dissolve: Checking For Understanding Flash Quiz - Quiz

This quiz titled 'How Substances Dissolve: Checking for Understanding' explores the principles of solubility in chemistry. It assesses understanding of molecular interactions, the rule 'like dissolves like', and... see morethe behavior of ionic and molecular compounds in solvents. Essential for students enhancing their chemistry knowledge. see less

2. How does an increase in temperature help a solute dissolve?

Explanation

An increase in temperature helps a solute dissolve because it causes the solute particles to move more quickly. This increased movement leads to more frequent collisions between the solute particles and the solvent particles. These collisions transfer more energy, which in turn breaks the bonds between the solute particles more easily. As a result, the solute particles are able to disperse and dissolve more effectively in the solvent.

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3. In order to dissolve a substance, solvent particles must be able to __________________

Explanation

Solvent particles must be able to attract solute particles more strongly than the solute particles attract one another in order to dissolve a substance. This is because the solvent particles surround and separate the solute particles, pulling them away from each other and dispersing them throughout the solvent. If the solute particles are more strongly attracted to each other than to the solvent particles, they will not separate and dissolve in the solvent.

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4. What is a nonpolar molecule?

Explanation

A nonpolar molecule is one in which the electrons are evenly distributed over the entire molecule, meaning it does not have any partial charges. This lack of partial charges makes nonpolar compounds insoluble in polar compounds, as they do not have the necessary attractions to form a solution.

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5. When a molecular compound dissolves, do the molecules break apart?

Explanation

When a molecular compound dissolves, the molecules are attracted to the water molecules due to intermolecular forces. As a result, they move towards the water molecules and away from each other, but they do not break apart. The individual molecules remain intact and do not form new bonds or break existing bonds. This process allows the molecular compound to be evenly distributed throughout the water, resulting in a homogeneous mixture.

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6. How can a solute affect a solutions physical properties?

Explanation

A solute can change the physical properties of the pure solvent by altering its response to temperature, specifically its freezing or melting point.

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7. How does stirring or shaking a solution allow more contact between solvent and solute particles?

Explanation

Stirring or shaking a solution moves the dissolved solute particles away from the rest of the solute. This creates more space for the solvent to come into contact with the solute that has not yet dissolved. By increasing the contact between the solvent and solute particles, stirring or shaking allows for a more efficient and effective dissolution process.

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8. Why do some ionic compounds like silver chloride (AgCl) not dissolve in water while others do?

Explanation

Some ionic compounds dissolve in water and others do not because attractions between ions in the crystal are stronger than those between the ions and water molecules. So the water cannot pull the ions apart. This explanation is correct because it explains the concept of solubility in terms of the strength of the attractions between ions in the crystal and the water molecules. When the attractions between the ions in the crystal are stronger, the water molecules are not able to overcome these attractions and dissolve the compound.

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9. How does increase in surface area help a solute dissolve more quickly?

Explanation

Increase in surface area helps a solute to touch more of the solvent, leading to more collisions between solute particles and solvent particles. This increased contact and collision rate result in the solute dissolving more quickly and efficiently.

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10. Why is energy needed to dissolve a solute?

Explanation

When a solute dissolves in a solvent, the attractions between the particles of the solute need to be broken in order for the solute to mix with the solvent. This requires energy because the particles of the solute are held together by intermolecular forces such as hydrogen bonding, dipole-dipole interactions, or London dispersion forces. Breaking these attractions requires input of energy. Once the attractions are broken, the solute particles can mix with the solvent particles, allowing the solution to form.

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11. What do these symbols​ mean?     or  

Explanation

The symbols "    or  " are used to indicate that the atom has either a slight (partial) positive or negative charge. This is commonly seen in chemistry when representing molecules or compounds that have polar bonds. The symbols are used to show the distribution of charge within the molecule, with the positive or negative charge being localized on specific atoms.

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12. Select the ones you like

Explanation

The given question asks the test-taker to select the options they like. The correct answer is Option1, indicating that the test-taker likes Option1.

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A general rule in chemistry is that "like dissolves like"....
How does an increase in temperature help a solute dissolve?
In order to dissolve a substance, solvent particles must be able to...
What is a nonpolar molecule?
When a molecular compound dissolves, do the molecules break apart?
How can a solute affect a solutions physical properties?
How does stirring or shaking a solution allow more contact between...
Why do some ionic compounds like silver chloride (AgCl)...
How does increase in surface area help a solute dissolve more quickly?
Why is energy needed to dissolve a solute?
What do these symbols​ mean?     or  
Select the ones you like
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