Acid/Bases, pH, molarity and dilutions

What do acids taste like and how do they feel?

• Bitter and slippery

• Sour and watery

• Sweet and sticky

• Salty and dry

What is produced when an acid reacts with a base?

• Hydrogen gas

• Carbon dioxide

• Water and a salt

• Oxygen and a salt

What is the pH of a 4.75 x 10^-5 M LiOH solution?

• 4.75

• 9.32

• 9.68

• 5.25

A solution has a volume of 3.0 L and contains 72 g of sulfuric acid (H₂SO₄). If the molar mass of H₂SO₄ is 98.0 g/mol, what is the molarity of the solution?

• 0.25 M

• 0.50 M

• 0.75 M

• 1.00 M

Tags

NGSS.HS-PS1-5

How many mL of aqueous 1.5 M barium hydroxide (Ba(OH)₂) solution must be diluted with water to prepare 150 mL of aqueous 0.25 M barium hydroxide (Ba(OH)₂) solution?

• 25 mL

• 50 mL

• 75 mL

• 100 mL

When acids are mixed with water, they release ​ (a)   ions.

• hydrogen (H+)
• hydroxide (OH-)

Acids, also known as ​ (a)   , will turn litmus paper ​ (b)   . This is because they have a pH ​ (c)   . They taste ​ (d)   .

• H+
• red
• below 7
• sour
• bitter
• above 7
• blue

Match the following

• Turns litmus paper red

• Basic Solution

• Concentration of hydrogen ions is the same as the concentration of hydroxide ions

• Base

• Turns litmus paper blue

• Acid

• pH greater than 7

• Neutral

• pH less than 7

• Acidic Solution

What is the balanced chemical equation for the reaction between aluminum and hydrochloric acid?

• Al + HCl = AlCl + H

• Al + 2HCl = AlCl₂ + H₂

• 2Al + 6HCl = 2AlCl₃ + 3H₂

• no reaction

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7

What is the balanced chemical equation for the reaction between sodium carbonate and hydrochloric acid?

• NaCO₃ + HCl = NaCl + HCO₃

• Na₂CO₃ + 2HCl = Na₂Cl₂ + H₂O + CO₂

• Na₂CO₃ + HCl = Na₂Cl + H₂O + CO₂

• Na₂CO₃ + 2HCl = 2NaCl + H₂O + CO₂

Tags

NGSS.HS-PS1-7