What ion is typically present in a solution classified as an acid?

• Na+

• Cl-

• H+

• OH-

What ion is typically present in a solution classified as a base?

• Na+

• Cl-

• H+

• OH-

What is the result of neutralization when an acid and a base react?

• Acid

• Base

• Salt

• Water

What taste is associated with Substance A according to the early chemists' categorization?

• Bitter taste

• Salty taste

• Sour taste

• Sweet taste

Which of the following is a property of Substance B?

• Reacts with carbonates to make CO2

• Turns blue litmus pink

• Reacts with metals to produce H2

• Turns red litmus blue

Tags

NGSS.MS-PS1-2

Who was the first person to suggest a reason why substances are categorized as either A or B?

• Mendeleev

• Boyle

• Arrhenius

• Dalton

What happens when Substance A reacts with metals?

• It makes soaps

• It does not react

• It produces H2

• It turns red litmus blue

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the result of the reaction between Substance B and fats?

• Production of CO2

• Production of H2

• Making soaps

• Making salt water

Tags

NGSS.MS-PS1-2

Who proposed the first definition of acids and bases according to the Arrhenius theory?

• John Dalton

• Dmitri Mendeleev

• Svante Arrhenius

• Louis Pasteur

According to the Arrhenius model, what do acids produce in water?

• OH- ions

• Na+ ions

• Cl- ions

• H+ ions