They are called superbases, because it is not possible to keep them in aqueous solution; this is due to the fact they will react completely with water, deprotonating it to the fullest extent possible. For example, the ethoxide ion conjugate base of ethanol will undergo this reaction in the presence of water:.
Unlike weak bases, which exist in equilibrium with their conjugate acids, the strong base reacts completely with water, and none of the original anion remains after the base is added to solution. Some other superbases include:. A weak base is a chemical base that does not ionize fully in an aqueous solution. A general formula for base behavior is as follows:.
A base can either accept protons from water molecules or donate hydroxide ions to a solution. This results in a relatively low pH compared to that of strong bases. The pH of bases in aqueous solution ranges from greater than 7 the pH of pure water to 14 though some bases have pH values greater than The formula for pH is:. Sometimes, however, it is more convenient to focus on the pOH of bases, rather than the pH. The pOH more directly references the [OH — ].
Smaller pK b values indicate higher values of K b; this also indicates a stronger base. Are these substances reacting with water when they are added to water? How would you classify the soluble ionic compounds: strong electrolyte, weak electrolyte, or nonelectrolyte? Explain your answer. Sodium chloride, NaCl, is a strong electrolyte, as is hydroiodic acid, HI. Write the chemical equations for what happens when these substances are added to water.
If not, describe, using words and equations, the different chemical process that takes place in each case. Be sure to explain your answer.
Homework Help 3,, Chemistry , Start filling in the gaps now. New to OneClass? Sign up. Back to top. Question 2 options:. Question 8 options:. Question 9 options:. Sodium bicarbonate, it is a weaker base and will only react with strong acids.
Sodium hydroxide, it is a strong base and will only react with strong acids. Sodium bicarbonate, it is a weak base and will only react with weak acids. When it reacts with acid, carbon dioxide is released, which causes expansion of the batter and forms the characteristic texture and grain in cakes, quick breads, soda bread, and other baked and fried foods.
Sodium bicarbonate is a white solid crystalline chemical compound usually in powder form. It is also called baking soda or bicarbonate soda having a pH value of around 8.
Baking soda is most commonly used in cooking as a leavening agent. Enter your email address to subscribe to this blog and receive notifications of new posts by email.
Email Address. Notify me of follow-up comments by email. Notify me of new posts by email. Skip to content. Page Contents show. Image Credits: The pH Scale. Why NH 4 NO 3 is an acidic salt? Why NH 4 Br is an acidic salt? Also Read Why the aqueous solution of NaHCO3 becomes basic?
An aqueous solution having a pH value of more than 7 is called a basic aqueous solution. Why NaHCO3 is used to neutralize an acid? Uses of Baking soda. Baking soda is used as an antacid to neutralize the stomach acid that helps in reducing ulcer pain and heartburn. It is used for lowering the pain of minor skin injury by neutralizing the toxins found on the skin surface. It is used to extinguish small intensity fires by being thrown over the fire.
Sodium Bicarbonate. How to Find Partial Pressures. What Is Urethane? How to Make Magnesium Chloride. What is Ethanolic Potassium Hydroxide? Polyethylene Glycol Vs.
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