Chemistry

Chemistry, 06.11.2019 06:31, pennstatealum

Abottle in lab is labeled [cocl2.6h2o] = 0.71 m in 9.217 m hcl. if you determine [cocl42-] to be 0.361 m at a particular temperature using absorbance measurements, what must be the value of [co(h2o)62+] in the solution at that temperature? express your response to three digits after the decimal.

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Chemistry, 23.07.2019 16:30, jay555538

In an aqueous chloride solution cobalt(ii) exists in equilibrium with the complex ion cocl42-. co2+(aq) is pink and cocl42-(aq) is blue. at low temperature the pink color predominates. at high temperature the blue color is strong. if we represent the equilibrium as: +(aq) + 4cl-(aq) cocl42-(aq) we can conclude that: 1. this reaction is: a. exothermic b. endothermic c. neutral d. more information is needed to answer this question.

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Chemistry, 06.08.2019 02:30, brii1387

Novelty devices for predicting rain contain cobalt (ii) chloride and are based on the following equilibrium and reacts to humidity as follows: cocl2(s) + 6 h2o(g) « cocl2·6h2o(s) dh = +25.9 kj what color will such an indicator be if rain is imminent? (a) purple (b) pink (c) clear (d) blue (e) need the temperature to decide

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Chemistry, 10.11.2019 03:31, chantianabess36

You're provided with a bottle labled [cocl2.6h2o] = 0.051 m in 4.60 m hcl. you heat a small volume of the solution in a hot water bath to 50 ∘c. if you determine that [cocl42-] = 0.031 m at 50 ∘c at equilibrium, what must be the equilibrium concentration of [cl-] at 50 ∘c?

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Chemistry, 18.11.2019 20:31, Thunderalesis7855

Astudent uses visible spectrophotometry to determine the concentration of cocl2(aq) in a sample solution. first the student prepares a set of cocl2(aq) solutions of known concentration. then the student uses a spectrophotometer to determine the absorbance of each of the standard solutions at a wavelength of 510nm and constructs a standard curve. finally, the student determines the absorbance of the sample of unknown concentration. a wavelength of 510nm corresponds to an approximate frequency of 6×1014s−1. what is the approximate energy of one photon of this light? 9×1047j.

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Abottle in lab is labeled [cocl2.6h2o] = 0.71 m in 9.217 m hcl. if you determine [cocl42-] to be 0.3...

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