What is the pKa of the conjugate acid of a base that has a Kb value equal to 2.1 × 10-7? Report your answer to the hundredths place. Assume the temperature is 25ºC.
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What is the pKa of the conjugate acid of a base that has a Kb value equal to 2.1 × 10-7? Report your answer to the hundredths place. Assume the temperature is 25ºC.
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- If the concentration of an acid in solution is 2.2 times larger than the concentration of its conjugate base, and the pH of the solution is 3.5, what is the pKa of the acid? Include the answer to 3 significant figuresGiven the Ka values, estimate the pKa value of each of the following acids without using a calculator (that is, is it between 3 and 4, between 9 and 10,and so on?): 1. nitrous acid (HNO2), Ka = 4.0 * 10-4 2. nitric acid (HNO3), Ka = 22 3. bicarbonate (HCO3-), Ka = 6.3 * 10-11 4. hydrogen cyanide (HCN), Ka = 7.9 * 10-10 5. formic acid (HCOOH), Ka = 2.0 * 10-4 6. phosphoric acid (H3PO4), Ka = 2.1Determine the pka of an acid whose concentration is 0.100M and pH is 2.86.
- What are some possible sources of error in determining the Ka value of an unknown acid except for the measurement innacuracy?!Phosphoric acid (H3PO4) is tribasic, with pKa's of 2.14, 6.86, and 12.4. The charge of the ionic form of the conjugate base that predominates at pH 8 is _______ .A weak base has Kb = 3.3x10-6. Calculate the pKa of the conjugate acid. Express your answer to two decimal places. pKa =
- The pH of a 4.0 × 10-3 mol dm-3 solution of weak base is 10.4. Calculate the Kb of the weak base.The pKa values of some hypothetical acids (HX, HY, HZ, HG) are shown below: HX pka=2.50, HY pKa=4.72, HZ pKa=1.87, HG pKa=5.67 Which of the following conjugate bases will be the weakest? a) X- b)Y- c)Z- d)G- e)they all have the same strength P.S could you please tell me which concept it is or a topic?What is the acid dissociation constant Ka for its conjugate acid? If the base dissociation constant Kb for hypochlorite ion is 3.3x10-7
- If the Kb value for a weak base is 2.6*10^-4, what is the value of its conjugate acid?Calculate the Kb value for the conjugate base of hydrosulfuric acid. The Ka for H2S is 9.6 x 10-8The Kb for a weak base is 4.5 x 10-6. What will be the Ka for its conjugate acid at 25 oC? Group of answer choices 2.2 x 10-9 8.2 x 10-3 4.5 x 10-6 5.6 x 10-7 1.8 x 10-8