Na galvanoplastia, o processo de decapagem se destina à obtenção de uma superfície metalicamente limpa, ou seja, isenta de impurezas e óxidos, por meio da remoção de camadas de óxido, ferrugem e casca de fundição ou laminação. nesse processo, a remoção se faz com soluções ácidas apropriadas, utilizando-se os ácidos clorídrico, sulfúrico, nítrico, fluorídrico e fosfórico. águas residuais dessa etapa do processo de galvanoplastia possuem caráter altamente ácido e precisam ser neutralizadas antes de seu descarte. elaborado pelo professor. o ácido clorídrico (hcl), citado acima, é formado pela ligação covalente entre o hidrogênio (h) e o não metal cloro (cl). adicionalmente, o elemento cloro pode formar outros ácidos, tais como o ácido cloroso, ácido clórico e ácido perclórico. esses três ácidos possuem, respectivamente, as seguintes fórmulas químicas. alternativas alternativa 1: hclo2, hclo3, hclo4. alternativa 2: hclo, hclo2, hclo3. alternativa 3: hclo, hclo3, hclo2. alternativa 4: hclo4, hclo3, hclo2. al
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Chemistry, 22.06.2019 05:30
The table describes how some substances were formed substance 19 description formed by boiling pure water formed by combining three hydrogen atoms to every nitrogen atom formed by adding 5 g of sugar to 1 l of water formed by compressing carbon under high pressure based on the given descriptions, which substance is most likely a mixture?
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Chemistry, 22.06.2019 07:20
Part b: study of equilibrium on solubility: mg(oh)2(s) ⇌ mg2+(aq) + 2 oh–(aq) cloudy clear (pink) 7. a. b. 8. a. b. 9. 10. 11. 12. when adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 7a. you should indicate which ion was added to or removed from the equilibrium mixture. when adding edta, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 8a. you should indicate which ion was added to or removed from the equilibrium mixture. upon heating in which direction is the equilibrium shifting? upon cooling in which direction is the equilibrium shifting? is the forward reaction a. endothermic explain your answers to questions 9, 10, and 11. (l) left (r) right (l) left (r) right b. exothermic
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Chemistry, 22.06.2019 14:00
How many absorptions would you expect to observe in the 13c nmr spectra of the following molecules? a) 3-chloropentane b) cis-4-methyl-2-pentene
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Chemistry, 22.06.2019 16:00
How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?
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Na galvanoplastia, o processo de decapagem se destina à obtenção de uma superfície metalicamente lim...
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