Acids
This is a substance that produces hydrogen ions in a water solution.
What is an acid?
This is a substance that produces Hydroxide ions in a water solution.
What is a base?
This is a compound formed when the negative ions from an acid and positive ions from a base combine.
What is a salt?
This is when a reaction occurs and a new substance is formed.
What is chemical change?
This is the highest pH an acid can have.
What is 6.99?
Name three signs of a of a chemical change has taken place.
What is change in color, change in energy, formation of a gas, and formation of a solid.
These are 4 properties of an acid.
What is sour taste, corrosive, changes blue litmus paper red, and produce hydronium ions?
Copper, aluminum, and zinc are three types of metals. Which of the following physical properties do they have in common?
A. conductivity
B. boiling point
C. Density
D. Boiling point
What is Conductivity
The label on a chemical in a science laboratory reads, “Strong Acid.” Based on this label, what can a student best determine about the chemical?
Low pH
These are two uses of common bases.
What is cleaning products, fertilizers, and antacids
When a certain number of hydrogen ions are mixed with the same number of hydroxide ions, the solution is _____________
Neutral
When scientists conduct experiments, they share their data and conclusions with other scientists. Which of the following explains why scientists share their information?
A. Society always accepts what scientists say.
B. New scientific laws and theories can be quickly established.
C. Other scientists can also get credit for scientific discoveries
D. Other scientists can try to verify the results by repeating the same procedure.
D
The pH of three solutions are shown below
1, Milk ( pH 6.7)
2, coffee (pH 5.0)
3, ammonia ( pH 11.6)
place them in order of least acidic to most acidic
ammonia, milk and coffee
An unknow substance is dissolved in water. The solution is corrosive, conducts electricity, and has a higher concentration of H+ ions than OH- ions. What kind of solution does this unknown substance form?
An Acid
The proper pH range of a pool is 7.2 to 7.8. How would you would adjust the pH of a pool if the pH gets too high (basic) or too low ( acidic)?
What is add an acid if it is high, and a base if it is low
Johnsel has an unknown substance in a beaker. he wants to determine the relative pH of the unknown substance. he places a piece of blue litmus paper into the substance, and the color did not change. He then placed a red litmus paper in the substance and again the color did not change. The substance in the beaker is
Neutral
Sofia is comparing the properties of four objects. Each object has a different shape: a square, a thin box, a sphere, and an irregular shape. The masses of all of the objects are the same. Which object must have the greatest density?
A. the object shaped like a sphere
B.the object with the irregular shape
C. the object with the largest volume
D. the object with the smallest volume
D