The question is incomplete, here is the complete question:
A 30.0-mL sample of an unknown strong base is neutralized after the addition of 12.0 mL of a 0.150 M HNO₃ solution. If the unknown base concentration is 0.0300 M, give some possible identities for the unknown base. (Select all that apply)
A.) Ca(OH)₂
B.) LiOH
C.) Sr(OH)₂
D.) Al(OH)₃
E.) NaOH
F.) Ba(OH)₂
<u>Answer:</u> The unknown base could be
<u>Explanation:</u>
To calculate the number of moles for given molarity of solution, we use the equation:
.......(1)
Molarity of solution = 0.150 M
Volume of solution = 12.0 mL
Putting values in equation 1, we get:
Molarity of solution = 0.0300 M
Volume of solution = 30.0 mL
Putting values in equation 1, we get:
Mole ratio of acid and base is calculated as:
Number of = 2 × number of ions
So, the unknown base is diprotic in nature.
Hence, the unknown base could be