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Which of the following is the correct chemical formula for sodium hydroxide?
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3. Chemical Reactions
Naming Ionic Compounds
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Which of the following ionic compounds is commonly used as a building material?
A
MgO \(\text{ (magnesium oxide)}\)
B
CaSO_4 \(\text{ (calcium sulfate, gypsum)}\)
C
NaCl \(\text{ (sodium chloride, table salt)}\)
D
KNO_3 \(\text{ (potassium nitrate)}\)
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Identify the nature and common uses of each ionic compound listed: MgO (magnesium oxide), CaSO_4 (calcium sulfate, gypsum), NaCl (sodium chloride), and KNO_3 (potassium nitrate).
Recall that building materials are typically substances used in construction for structural or finishing purposes, such as cement, plaster, or drywall components.
Recognize that MgO is used in refractory materials and some cements, NaCl is common table salt, and KNO_3 is primarily used as a fertilizer or in food preservation.
Understand that CaSO_4, specifically in its hydrated form gypsum, is widely used in construction as plaster and drywall, making it a common building material.
Conclude that among the options, CaSO_4 (calcium sulfate, gypsum) is the ionic compound most commonly used as a building material.
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