a. Copper metal was added to concentrated nitric acid in the hood. A brown, pungent gas was given off. What is the name & the formula for the gas? (Not hydrogen). A green solution of copper (ll) nitriate was also formed, (now go to b)... b. ... Water was added to this green solution from (a). The solution turned blue & was then treated with excess aqueous NaOH. A blue precipitate was formed. Write an equation for the metathesis reaction. c. The liquid formed from (b), with that blue precipitate was heated. The blue precipitate changed to a black solid. Write the name & formula of this black solid...
a. Copper metal was added to concentrated nitric acid in the hood. A brown, pungent gas was given off. What is the name & the formula for the gas? (Not hydrogen). A green solution of copper (ll) nitriate was also formed, (now go to b)...
b. ... Water was added to this green solution from (a). The solution turned blue & was then treated with excess aqueous NaOH. A blue precipitate was formed. Write an equation for the metathesis reaction.
c. The liquid formed from (b), with that blue precipitate was heated. The blue precipitate changed to a black solid. Write the name & formula of this black solid...
d. ... When dilute H2SO4 was added to this black solid, It dissolved to form a blue solution. Then, when excess zinc metal was added to this blue solution, a red-brown precipitate formed, & the blue solution eventually turned colorless. Name the red-Brown ppt & Wrtie an equation for the second reaction (I.e. the reaction between the dissolved blue substance & the zinc, that resulted in the red-brown ppt).
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