Multiple Choice
What is the H+ ion concentration in a 2.1 × 10-4 M Ca(OH) 2 solution?
A) 7.3 × 10-4 M
B) 4.2 × 10-4 M
C) 2.1 × 10-4 M
D) 2.4 × 10-11 M
E) 4.8 × 10-11 M
Correct Answer:

Verified
Correct Answer:
Verified
Q24: Which one of the following is a
Q42: What is the name of a proton
Q51: What is the pOH of a 0.025
Q73: HCN is classified as a weak acid
Q99: What is the conjugate acid of NH<sub>3</sub>?<br>A)
Q108: The substance NH<sub>3</sub> is considered to be<br>A)
Q124: Hydroxylamine,HONH<sub>2</sub>,readily forms salts such as hydroxylamine hydrochloride
Q128: Which is a Lewis base?<br>A)BCl<sub>3</sub><br>B)Cu<sub>2</sub><sup>+</sup><br>C)Cl<sup>-</sup><br>D)Mn<sub>2</sub><sup>+</sup><br>E)NH<sub>4</sub><sup>+</sup>
Q129: What is the concentration of OH<sup>-</sup> in
Q130: For H<sub>3</sub>PO<sub>4</sub>,K<sub>a</sub><sub>1</sub> = 7.3 × 10<sup>-</sup><sup>3</sup>,K<sub>a</sub><sub>2</sub> =