Chemistry

Chemistry, 26.07.2019 07:30, gvizabal

If the kb of a weak base is 1.1 × 10-6 m, what is the ph of a 0.49 m solution of this base?

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Chemistry, 21.07.2019 11:30, dmgboos6

!30 2. which of the following statements are true about a strong base and a weak base at a ph of 11? hcl will not bring the ph of either solution to ph 7. both bases require the same amount of hcl to reach ph 7 because they are both at the same initial ph. the weak base will require less hcl to bring the ph to 7 than the strong base. the strong base will require less hcl to bring the ph to 7 than the weak base.

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Chemistry, 21.07.2019 19:30, BreBreDoeCCx

20 points! (2) which of the following statements are true about a strong base and a weak base at a ph of 11? hcl will not bring the ph of either solution to ph 7. both bases require the same amount of hcl to reach ph 7 because they are both at the same initial ph. the weak base will require less hcl to bring the ph to 7 than the strong base. the strong base will require less hcl to bring the ph to 7 than the weak base.

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Chemistry, 06.10.2019 03:00, denareena97

To understand the relation between the strength of an acid or a base and its pka and pkb values. the degree to which a weak acid dissociates in solution is given by its acid-ionization constant, ka. for the generic weak acid, ha, ha(aq)⇌a−(aq)+h+(aq) and the acid-ionization constant is given by ka=[a−][h+][ha] similarly, the degree to which a weak base reacts with h2o in solution is given by its base-ionization constant, kb. for the generic weak base, b, b(aq)+h2o(l)⇌bh+(aq)+oh−(aq) and the base-ionization constant is given by kb=[bh+][oh−][b] another way to express acid strength is by using pka: pka=−logka another way to express base strength is by using pkb: pkb=−logkb part a a new potential heart medicine, code-named x-281, is being tested by a pharmaceutical company, pharma-pill. as a research technician at pharma-pill, you are told that x-281 is a monoprotic weak acid, but because of security concerns, the actual chemical formula must remain top secret. the company is interested in the drug's ka value because only the dissociated form of the chemical is active in preventing cholesterol buildup in arteries. to find the pka of x-281, you prepare a 0.079 m test solution of x-281 at 25.0 ∘c. the ph of the solution is determined to be 2.40. what is the pka of x-281?

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Chemistry, 26.10.2019 09:43, JadaaJayy

To understand the relation between the strength of an acid or a base and its pka and pkb values. the degree to which a weak acid dissociates in solution is given by its acid-ionization constant, ka. for the generic weak acid, ha, ha(aq)⇌a−(aq)+h+(aq) and the acid-ionization constant is given by ka=[a−][h+][ha] similarly, the degree to which a weak base reacts with h2o in solution is given by its base-ionization constant, kb. for the generic weak base, b, b(aq)+h2o(l)⇌bh+(aq)+oh−(aq) and the base-ionization constant is given by kb=[bh+][oh−][b] what is pkb of the conjugate base of x-281? (assume 25 ∘c.) express your answer numerically.

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If the kb of a weak base is 1.1 × 10-6 m, what is the ph of a 0.49 m solution of this base?...

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