Contrast two voltage waveforms for controlled potential electrolysis and the resulting current vs voltage plots that result. what are the conditions that produce the shapes of the curves and what analytical information can be extracted from each? model the titration of carbonic acid, a diprotic weak acid with pka values of 6.3 and 10.3, with naoh. what are the prominent features of thistitration curve and how can this information be used to extract analytically useful information about the sample?

precipitation

explanation:

when it goes from cloud to rain/back to earth in the form of rain

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

може ли да зареждате повече информация, моля

the answer is symmetrical : )