Solutions and PH

Which reason explains why gas bubbles are released when a carbonated beverage is opened? 

• decreasing the pressure increases the rate of solution
• the solubility of a gas in a liquid decreases with decreased pressure
• Exposing a liquid to air causes it to become a saturated solution 
• The solvent changes from a liquitd to a gas when the beverage is opened.

Which reason explains why gas bubbles are released when a carbonated beverage is opened? 

• decreasing the pressure increases the rate of solution
• the solubility of a gas in a liquid decreases with decreased pressure
• Exposing a liquid to air causes it to become a saturated solution 
• The solvent changes from a liquitd to a gas when the beverage is opened.

How is a dilute solution different from a concentrated solution? 

• The dilute solution has a liquid solvent
• The dilute solution is at a lower temperature
• The dilute solution has a smoller total volume
• The dilute solution has less solute per volum of solvent

Saltwater is an example of a solution. Compared to the salt, which term best describes the water in the solution? 

• Solute
• Solvent
• mixture
• suspension

Which is a homogenous mixture? And why?

• The soda because the concentration is the same throughout. 
• The chex mix because the concentration can be seperated
• The soda because it cannot be seperated
• The chex mix because it is not the same throughout. 

Which of the following will slow the rate at which sugar dissolves in water

• cooling the water
• crushing the sugar
• increasing the amount of sugar
• increasing the temperature

A chemist is working with a liquid substance that tastes bitter, feels slippery, and conducts an electric current. Which of the following is the chemist most likely working with? 

• a salt
• a base
• an acid
• distilled water

How is a salt formed during a neutralization reaction? 

• a hydorgen ion reacats with a hydroxide ion
• An acid changes to a different state of matter
• a metal ion takes the place of the hydrogen of an acid
• The water molecule breaks into hydroxide and hydorgen ions

What happens to an acid when it dissolves in water? 

• it increases the number of hydroxide ions in water 
• It increases the number of hydrogen ions in water
• It produces a salt that collect at the bottom of the container
• It breaks water into individual atoms of hydrogen and oxygen

Tags

NGSS.HS-PS1-7

BASE + ACID ----> SALT +?

• water
• oxygen
• hydrogen ion
• hydroxide ion