13 Questions
What is the main function of the cell membrane?
To selectively allow nutrients and oxygen to enter the cell
What is the process by which oxygen enters the cell?
Active transport
How do sugars and amino acids enter the cell?
By active transport
According to the solubility rules, which of the following salts is likely to be insoluble in water?
Barium sulfate (BaSO4)
Which of the following hydroxides is categorized as marginally soluble according to the solubility rules?
Barium hydroxide (Ba(OH)2)
Which of the following ions is an exception to the solubility rule for chloride, bromide, and iodide salts?
Pb2+
Based on the solubility rules, which of the following sulfide salts is likely to be only slightly soluble?
Ammonium sulfide ((NH4)2S)
Which of the following salts is categorized as soluble based on the solubility rules?
Sodium phosphate (Na3PO4)
According to the solubility rules, which of the following salts is likely to be insoluble in water?
PbSO4
Which of the following ions is an exception to the solubility rule for chloride, bromide, and iodide salts?
Ag+
Based on the solubility rules, which of the following hydroxides is categorized as marginally soluble?
Ba(OH)2
According to the solubility rules, which of the following sulfide salts is likely to be only slightly soluble?
CaS
Which of the following salts is categorized as soluble based on the solubility rules?
AgNO3
Study Notes
Cell Membrane and Transport
- The main function of the cell membrane is to regulate the movement of substances in and out of the cell.
- Oxygen enters the cell through the process of diffusion.
- Sugars and amino acids enter the cell through the process of facilitated diffusion.
Solubility Rules
- According to the solubility rules, hydroxide salts with group 1 ions (e.g., NaOH, KOH) and Ca(OH)2 are soluble.
- Hydroxide salts with group 2 ions (e.g., Mg(OH)2, Ba(OH)2) are marginally soluble.
- Sulfide salts with group 1 ions (e.g., Na2S, K2S) and group 2 ions (e.g., MgS, CaS) are soluble.
- Sulfide salts with transition metal ions (e.g., CuS, ZnS) are slightly soluble.
- Chloride, bromide, and iodide salts are generally soluble, except for those with Ag+, Hg2+2, and Pb2+ ions.
- Salts with Ag+, Hg2+2, and Pb2+ ions are exceptions to the solubility rule for chloride, bromide, and iodide salts.
Test your knowledge on the selective permeability of cell membranes and the movement of small molecules and ions across the plasma membrane. Explore how nutrients enter the cell, waste products leave it, and the exchange of oxygen and carbon dioxide takes place.
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