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Title: Copper reacts with nitric acid
Caption: Copper reacts with nitric acid. Copper metal (Cu) coil is placed in a test tube with concentrated (17M) nitric acid (HNO3). Copper is oxidized to form copper nitrate (Cu(NO3)2) and brown nitrogen dioxide gas (NO2) bubbles: Cu + HNO3 -> Cu(NO3)2 + NO2 + H2O. The progression of the reaction is shown in this sequence.
Credit: Album / Turtle Rock Scientific/Science Source
Image size: 7600 × 3288 px | 71.5 MB
Print size: 64.3 × 27.8 cm | 2992.1 × 1294.5 in (300 dpi)