Acids, Bases and Salts

Which of the following values would represent the pH of a strong base?

• 1

• 8

• 7

• 13

Which among the following is not a base?

• NaOH

• KOH

• HCl

• NH₄OH

Neutralization reactions

• formed from joining positive and negative ions 
• increases OH ions
• froms a salt and water
• increases H2O ions

Tags

NGSS.MS-PS1-5

Acids are __________, which means they "eat away" at other materials.

• transitional metal

• alkaline

• flammable

• corrosive

Acidic solutions exhibit a higher ratio of H₃O⁺ ions, known as...

• neutrons

• hydroxide

• electrons

• hydronium

When you place blue litmus paper into an unknown clear solution, the blue litmus paper turns red.

Which of the following represents the most logical conclusion?

• The substance has a pH value of "2".

• The substance is a base.

• The substance has a pH value of "7".

• The substance is acidic.

What range of values on the pH scale represent solutions with a higher ratio of hydroxide (OH^-) ions?

• below 7

• 7

• above 7

• 0-14

Identify the products of the following reaction:

CaCO3 + 2HCl -->

• Calcium hydrogen carbonate and chlorine gas

• Calcium chloride and water

• Calcium oxide, carbon dioxide and water

• Calcium chloride, carbon dioxide and water

What are acids?

• Acids are substances that taste sweet, can dissolve metals (depending on the type of acid) and are acidic in nature.

• Acids are substances that taste sour, can dissolve metals (depending on the type of acid) and are acidic in nature.

• Acids are substances that taste sour, can dissolve metals (depending on the type of acid) and are basic in nature.

What are Bases?

• Bases are substances that are bitter in taste, feel soapy when touched and are acidic in nature.

• Bases are substances that are sour in taste, feel soapy when touched and are basic in nature.

• Bases are substances that are bitter in taste, feel soapy when touched and are basic in nature.

• Acids are substances that are bitter in taste, feel soapy when touched and are basic in nature.