which of the following items is a salt?(1 point) Responses calcium carbonate calcium carbonate sodium hydroxide sodium hydroxide carbonic acid carbonic acid antacid
sodium hydroxide is a salt.
The item that is a salt is sodium hydroxide.
To determine which of the items is a salt, we need to understand what a salt is.
A salt is a chemical compound formed when an acid reacts with a base. It is composed of a positively charged ion (cation) and a negatively charged ion (anion). In the given options, calcium carbonate, sodium hydroxide, and carbonic acid are not salts.
Calcium carbonate (CaCO3) is a compound that is commonly found in rocks and minerals like chalk and limestone. It does not result from the reaction of an acid and a base.
Sodium hydroxide (NaOH) is a strong base, also known as caustic soda. It does not form a salt; it dissociates into sodium ions (Na+) and hydroxide ions (OH-) in water.
Carbonic acid (H2CO3) is a weak acid that forms when carbon dioxide dissolves in water. Like calcium carbonate and sodium hydroxide, it does not result from the reaction between an acid and a base.
The remaining option, antacid, does not specify the exact chemical compound. However, antacids are commonly used to neutralize excess stomach acid and usually contain a salt compound like magnesium hydroxide (Mg(OH)2) or aluminum hydroxide (Al(OH)3).
Therefore, the item that is a salt in the given options is the antacid.