What does ka stand for in chemistry

When dealing with equilibrium constant, remember adding water to an aqueous acid or base solution does not change its equilibrium constant. A pH value around 7 is neutral neither acidic nor basic , a pH value less than 7 is acidic, and a pH value greater than 7 is basic.

Ka is the acid dissociation constant. A large Ka value indicates a strong acid because it means an acid largely dissociates into its ions. A large Ka value also means the reaction arrow favors the formation of production.

In contrast, a small Ka value means only a small amount of acid dissociates, indicating a weak acid. A small Ka value means the reaction favors the reactants rather than the products. Most weak acids have Ka values between 10 -2 to 10 The smaller the pKa value, the stronger the acid. If Varsity Tutors takes action in response to an Infringement Notice, it will make a good faith attempt to contact the party that made such content available by means of the most recent email address, if any, provided by such party to Varsity Tutors.

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Hanley Rd, Suite St. Louis, MO Subject optional. Email address: Your name:. Possible Answers:. Correct answer:. Explanation : For every acidic or basic solution, the product of the hydroxide ion concentration and the hydronium ion concentration will be equal to , the dissociation constant for water.

In other words: Since we are given the hydroxide ion concentration, we can determine the hydronium ion concentration using this equation. Report an Error. Explanation : Acetic acid is a weak acid, and its dissociation reaction is written as: Using an ICE table, we can find the pH of the solution when the sodium acetate is added: I: There is initially a 0.

Use this value in the equation for pH:. What property distinguishes a strong acid from a weak acid? Possible Answers: A weak acid will dissociate completely in water and have a low Ka value.

A strong acid will dissociate completely in water and have a low Ka value. There is no difference between a strong acid and a weak acid based on their properties in water. A weak acid will fail to dissociate completely in water and have a high Ka value. A strong acid will dissociate completely in water and have a high Ka value. Correct answer: A strong acid will dissociate completely in water and have a high Ka value. Explanation : The acid dissociation constant Ka is used to distinguish strong acids from weak acids.

Which of the following is what determines the strength of an acid? Possible Answers: Electronegativity values. Correct answer: The Ka.

Explanation : The Ka is the acid dissociation constant, and thus it is what determines how strong the acid is. Copyright Notice. If you're seeing this message, it means we're having trouble loading external resources on our website. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. Donate Login Sign up Search for courses, skills, and videos. Science Organic chemistry Resonance and acid-base chemistry Organic acid-base chemistry. Organic acid-base mechanisms.

Ka and pKa review.