Acids, Bases and Salts

According to the pH range which substance is more acidic than lemon juice

• Hydrochloric acid
• cabbage
• milk

Tags

NGSS.MS-PS1-2

Neutralization reactions

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

Tags

NGSS.MS-PS1-2

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.

Tags

NGSS.MS-PS1-2

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

Do acids and bases conduct electricity?

• Only acids conduct electricity

• Only bases conduct electricity

• Bases and acids conduct electricity

• Neither conduct electricity

Tags

NGSS.MS-PS2-3

Identify the gas evolved.

• Hydrogen

• Nitrogen

• Carbon dioxide

• Oxygen

Tags

NGSS.MS-PS1-2

Which one of the following can be used as an acid-base indicator by a visually impaired student?

• Litmus

• Turmeric

• Methyl Orange

• Vanilla essence

Which of the following salts does not contain water of crystallisation?

• Blue vitreol

• Baking soda

• Washing soda

• Gypsum