Which substances were ionic?
A. Oil
B. Cornstarch
C. Sodium Chloride
D. Sodium Bicarbonate
Answer (2)
Ionic compounds are typically solid, crystalline, soluble in water, and conductive.
Oil and cornstarch do not exhibit these properties.
Sodium chloride and sodium bicarbonate possess the characteristics of ionic compounds.
Therefore, sodium chloride and sodium bicarbonate are ionic substances. sodium chloride, sodium bicarbonate
Explanation
Understanding the Problem We are given a table with the properties of four substances: Oil, Cornstarch, Sodium Chloride, and Sodium Bicarbonate. The properties listed are: State of Matter, Appearance and Texture, Crystalline Structure (Yes/No), Solubility in Water, and Conductivity (Yes/No). Our task is to identify which of these substances are ionic.
Properties of Ionic Compounds Ionic compounds are generally characterized by the following properties:
Solid state at room temperature
Crystalline structure
Soluble in water
Conduct electricity when dissolved in water
Analyzing Each Substance Now, let's examine each substance based on the given properties:
Oil: Liquid, Amorphous, No crystalline structure, Insoluble in water, Non-conductive. Oil does not exhibit the properties of ionic compounds.
Cornstarch: Solid, Powdery, No crystalline structure, Insoluble in water, Non-conductive. Cornstarch does not exhibit the properties of ionic compounds.
Sodium Chloride: Solid, Powdery, Crystalline structure, Soluble in water, Conductive. Sodium chloride exhibits all the typical properties of ionic compounds.
Sodium Bicarbonate: Solid, Powdery, Crystalline structure, Mostly soluble in water, Conductive. Sodium bicarbonate also exhibits the properties of ionic compounds.
Identifying Ionic Substances Based on the analysis, Sodium Chloride and Sodium Bicarbonate are identified as ionic substances because they possess the key characteristics associated with ionic compounds.
Final Answer Therefore, the ionic substances are sodium chloride and sodium bicarbonate.
Examples
Identifying ionic compounds is crucial in various fields, such as chemistry and materials science. For instance, understanding the ionic nature of sodium chloride (table salt) helps us explain its solubility in water and its ability to conduct electricity when dissolved. This knowledge is also essential in designing new materials with specific electrical and structural properties. By recognizing the properties of ionic compounds, we can predict their behavior in different environments and utilize them effectively in various applications, from batteries to pharmaceuticals.
The ionic substances among the options provided are Sodium Chloride and Sodium Bicarbonate, as they exhibit the characteristic properties of ionic compounds such as solubility in water and conductivity. Oil and cornstarch do not display these properties and are not ionic. Thus, the answer is C. Sodium Chloride and D. Sodium Bicarbonate.
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