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Chemistry
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ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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If a weak acid (HA) has a Ka of 1.35 x 10-8, what is Kb for A-, the conjugate base.
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- Ką for acetylsalicylic acid (aspirin), HC,H-O4. is 3.0010-4. Ką for hypochlorous acid, HC1O, is 3.50x10-8. Ką for hydrocyanic acid, HCN, is 4.00×10-10. What is the formula for the weakest conjugate base?arrow_forwardThe value of K₂ for phenol (a weak acid) is 1.00×10-1⁰ What is the value of Kb, for its conjugate base, C6H5O?arrow_forwardWhat is the conjugate base in this reaction: H,PO,+ H,O H,O+H,PO, O H.0+ O HO O HPO, O OHarrow_forward
- N2H4 is a weak base. approximately how many moles of N2H4 are required for each mole of N2H5+ to create a solution with a pH equal to 8.5?arrow_forwardA 0.051 M weak acid solution, HA, has a pH of 1.95. What is the Ka of the acidarrow_forwarddetermine the Ka of an acid HA whose 0.04679 M solution has a pH of 1.589 HA A- + H+arrow_forward
- An unknown weak acid with a concentration of 0.080 M has a pH of 1.80. What is the Ka of the weak acid?arrow_forwardThe acid ionization constant, Ka, of a certain weak acid HA equals 1.4 x 10-11. What does Kb for the conjugate base, A- equal? Assume that the temperature equals 25 ˚C.arrow_forwardCalcuate the pH of a 0.2M solution of NH4CL. Hint: this is a salt so write an equation of dissociation, and figure out what will react to form an acid or a base. Ka=5.6x10-10arrow_forward
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