Acid Base and Buffer

In the reaction HCl + H₂O --> H₃O⁺ + Cl^-, what is the conjugate acid?

• HCl
• H₂O
• H₃O⁺
• Cl^-

Which one of the following statements about strong acids is TRUE?

• Strong acids are 100% ionized in water.
• The conjugate base of a strong acid is a strong base.
• Strong acids are very concentrated acids.
• Strong acids produce solutions with a higher pH than weak acids. 

What is the endpoint of a titration

• Where the amount of acid and base are equal as shown by a colour change 
• Where there is no base
• When the volume of base in the burette is used up 
• When there is no acid

The pH at the equivalence point of the titration of a strong acid with a strong base is usually:

• acidic 3.9
• acidic 4.5
• neutral 7.0
• basic 8.2

What are the products of the neutralization shown below?

Ca(OH)₂ + H₂CO₃ -->

• H₂O + Ca₂CO₃

• CaO + CO₃

• H₂O + CaCO₃

• CO₂ + CaH₂

Tags

NGSS.HS-PS1-2

Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?

• strongly acidic
• slightly acidic
• strongly basic
• slightly basic

Which of the following is a conjugate acid/base pair?

• HCl/OCl^-
• H₂SO₄/SO₄^2-
• NH₄⁺/NH₃
• H₃O⁺/OH^-

In which of the following reactions does H₂PO₄^- act as an acid?

• H₃PO₄ + H₂O --> H₃O⁺ + H₂PO₄^-
• H₂PO₄^- + H₂O --> H₃O⁺ + HPO₄^2-
• H₂PO₄^- + OH^- --> H₃PO₄ + O^2-
• The ion cannot act as an acid

Which type of titration is shown by this titration curve?

• Titration of a strong acid by a strong base 
• Titration of a weak acid by a strong base 
• Titration of a strong base by a strong acid 
• Titration of a weak base by a strong acid

What acid and what base would you choose to prepare the salt potassium chlorate?

• KOH and HClO₃
• KOH and HClO₂
• HK and OHClO₃
• HK and OHClO₂

Tags

NGSS.HS-PS1-6