Maaike+and+David's+Copper+Reaction+Cycle

liquid called Cu(II)(OH)2. We heated this to get out the CuO || ||   || a blackish goo. We added water to this and let it settle || ||   || supernatant run along a stirring rod so we could get the water out without losing any copper) || || Some copper ions were lost during the decanting process and escaped with the supernatant. ||
 * = copper before the reactions ||= [[image:Photo_9.jpg width="256" height="192" align="left"]] ||= Sources of Error ||
 * = Copper (II) nitrate and nitrogen dioxide (NO2) emerge as the products of the reaction. ||= [[image:Photo_12.jpg width="256" height="192" align="left"]] ||= More energetic copper ions may have escaped with the nitrogen dioxide gas. ||
 * = then, we added NaOH, using a pipette ||= [[image:Photo_13.jpg width="256" height="192" align="left"]] ||=  ||
 * = and watched them react! ||= [[image:Photo_14.jpg width="251" height="196" align="left"]][[image:Photo_15.jpg width="249" height="188" align="left"]] ||= A significant amount of copper hydroxide gel had adhered to the stirring rod during the stirring process. ||
 * they turned into a bluish
 * they turned into a bluish
 * after we heated it, it had turned into
 * We then decanted the product (let the
 * AN ACID IS BORN:

Hydrochloric acid is added to the copper (II) oxide precipitate, thus forming water and copper (II) chloride. || ||   || dish + copper: 48.219 end mass: 0.481 percent yield: 87.93 ||  ||   ||
 * Copper (II) phosphate is formed, along with sodium chloride, by adding sodium phosphate to the copper (II) chloride solution. || [[image:Photo_10.jpg width="256" height="192"]] ||  ||
 * The copper (II) phosphate solution is heated in order to accelerate the evaporation process. || [[image:Photo_13.jpg width="256" height="192" align="left"]] ||  ||
 * Copper (II) phosphate precipitate is collected in a filter, essentially separating it from particles of sodium chloride. || [[image:Photo_16.jpg width="256" height="192" align="left"]] || A significant amount of the dried copper (II) phosphate precipitate was spilled onto the work surface. A large portion of it was later recovered, but nonetheless, billions of copper ions were lost. ||
 * weight of evaporating dish: 47.738