18 Questions
What is the indication of a base solution on a litmus paper?
It turns blue
What is the purpose of hydroxyl ions in the Lime-Soda Softening Process?
To remove water hardness
What is water hardness caused by?
Dissolved salts of calcium and magnesium
What is the dissociation product of NaOH in water?
Na+ and OH-
How many hydroxyl ions per molecule can calcium hydroxide (Ca(OH)2) furnish?
Two
What is the purpose of phenolphthalein in base solution?
To indicate basicity
What is the product of the reaction between Ca(HCO3)2 and Ca(OH)2 in the Lime-Soda Softening Process?
2CaCO3(S)
Which of the following is a property of strong solutions of bases?
They are caustic and have a slippery feel
What is the purpose of adding sodium hydroxide to glyceryl stearate in soap manufacturing?
To form a metallic salt
What is the purpose of the liming process in the leather industry?
To remove the hair from the epidermis
What is the reaction between a base and the oxide of a non-metal?
Forming a metallic salt and water
What is the application of the ability of a hydroxide solution to dissolve lignin in the pulp and paper industry?
To remove the lignin from the cellulose fibers
In the air-separation process, what is the purpose of the potassium hydroxide solution?
To remove carbon dioxide content
What is the result of the reaction between MgCl2 and Ca(OH)2 in the Lime-Soda Softening Process?
Mg(OH)2(S) and CaCl2
What is produced during the saponification reaction in soap manufacture?
Sodium stearate and glycerin
What is the effect of strong solutions of bases on wooden materials?
They destroy them by dissolving the lignin
What is the purpose of using sodium hydroxide in paper manufacturing?
To digest wood chips to produce pulp
What is the general reaction of a base solution with a fat?
Fat + Base → Metallic Salt + Alcohol
This quiz covers the identification and properties of bases, including their reactions with indicators and the dissociation of hydroxyl ions in solution. Learn about the characteristics of bases and how they differ from acids.
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