Chemistry

Chemistry, 02.09.2019 21:10, byrdkellykellybyrd

Complete and balance the following acid-base equations:
(a)hcl gas reacts with solid ca(oh)2
(b)a solution of sr(oh)2 is added to the solutionn of hno3.

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Biology, 29.07.2019 20:20, casting479

Which of the following describes a solution that contains a buffer? a. sodium hydroxide, a base, is added to the solution, and the ph of the solution becomes higher. b. distilled water is added to the solution, and the ph of the solution does not change. c. acetic acid is added to the solution, and the ph of the solution becomes lower d. citric acid is added to the solution, but the ph of the solution does not change. submit

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Chemistry, 02.09.2019 18:30, amoore51

There are two common ways to make a buffer: i) add relevant amounts of weak acid (or base) and conjugate base (acid) together, or ii) add strong acid to the weak base (or strong base to weak acid). a) what mass of na2co3(s) must be added to 250 ml of 0.30 m nahco3(aq) to give a ph 9.75 buffer solution, given pka (hco3) = 10.25? b) what mass of naoh(s) must be added to the same 250 ml solution of 0.30 m nahco3(aq) to give the same ph 9.75 buffer solution? c) sketch the speciation curve of this buffer for 2 ph units either side of the requested buffer ph. indicate quantitatively, the ph at which the cross-over point between the two species lies. in both cases, you may assume no change in volume when the solid is added.

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Chemistry, 02.09.2019 21:10, kaleahearly123

Complete and balance the following acid-base equations: (a)a solution of hclo4 is added to the solution of lioh. (b) aqueous h2so4 reacts with naoh. (c)ba(oh)22 reacts with hf gas.

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Chemistry, 24.10.2019 18:43, taytaycola223

Which of the following is not a property of a buffer solution? a) it is a mixture of a weak acid and its conjugate base. b) resists ph changes because it reacts with added acid or base. c) the maximum buffer capacity is at ph = pka. d) ph is dependent on the solution ionic strength and temperature. e) ph is independent of concentration.

Answers: 3

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Complete and balance the following acid-base equations:
(a)hcl gas reacts with solid ca(oh)2<...

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