1.30 recall the charges of common ions in this specification

Positive

• K +
• Na +
• Li +
• H +

Doubly Positive

• Mg 2+
• Ca 2+

Triply Positive

• Al 3+

Negative

• Cl-
• Br-
• I-
• F-
• OH-

Doubly Negative

• SO4 2-
• CO3 2-

Triply Negative

• NO 3-