__________ (5% on wood) is used usually after the addition of magnesium ion. The mechanism for inactivating the ions by __________ precipitating the ions, but, strictly speaking, it is not a chelating agent.

• A. Sodium disulfate
• B. Sodium peroxide
• C. Sodium silicate
• D. is used usually after the addition of magnesium ion. The mechanism for inactivating the ions by __________ precipitating the ions, but, strictly speaking, it is not a chelating agent.a) Sodium disulfateb) Sodium peroxidec) Sodium silicated) Sodium hydroxide