Vivian+and+Miyu's+Copper+Reaction+Cycle

Slight darker stains are visible. || After dropping the acid on our piece of copper, it looked like it was dissolving. Puffs of ugly brown gas rose from the solution. *The visible gas needed some air to enter the fume hood to be able to get out of the beaker.
 * =**Caption**= || =**Picture**= || =**Analysis**= ||
 * Us and our copper piece: || [[image:Photo_8.jpg width="261" height="200" caption="Yay for copper!"]] || It's a rectangle. Looks reddish-brown.
 * Copper after the brown gas left.

What remained changed from brown-ish yellow to green, and finally to blue. || || It's a deep hue of blue. Copper and acid in a liquid state. Did some copper leave with the gas or was it just produced from the reaction of acid contacting the copper?

Seems like it's more than 10mL of acid + .5g of Cu || just like the acid we first poured on our copper. || (II) hydroxide and became warm. || ||   || bottom and separated from the water. || || Copper must be more dense than water, even in this dusty state. (ie. penny fountains) || our copper, some of the copper may have escaped into the bigger beaker as well. || remains. || ||   || This way more unwanted ions will be drained out. || ||   || doesn't drain out along with the water ions. || ||   || left. || ||   || still see a layer on the top. || ||   || The contents of the large beaker were poured into a petri dish and we'll see later how that comes out. || ||   || (HCl) ||  ||   || the sodium phosphate! || ||   || made our mixture cloudy. || ||   || we didn't have much water left.
 * 25mL 8M NaOH || [[image:写真（2011-04-20_12.51）_#2.jpg width="256" height="192"]] || It's transparent and looks like water,
 * Mixed(without adding water first) || [[image:写真（2011-04-20_12.52）_#4.jpg width="256" height="192"]] ||  ||
 * The NaOH reacted with the Copper
 * Got thicker. || [[image:写真（2011-04-20_12.59）.jpg width="256" height="192"]] ||  ||
 * Finally added water. || [[image:写真（2011-04-20_12.59）_#2.jpg width="256" height="192"]] ||  ||
 * Became darker than the others'. || [[image:写真（2011-04-20_13.01）.jpg width="256" height="192"]] ||  ||
 * Almost skipped the entire reaction. || [[image:写真（2011-04-20_13.05）.jpg width="256" height="192"]] || *some copper stayed on the mixing rod ||
 * Burned until it became a brown-black. || [[image:写真（2011-04-20_13.19）.jpg width="256" height="192"]] ||  ||
 * The copper than remained sank to the
 * Decant #1 || [[image:写真（2011-04-22_12.49）_#5.jpg width="256" height="192"]] || While trying to separate ions in the water from
 * The black stuff is the burned copper that
 * Pouring in some more drinking water.
 * Waiting for the copper to settle so it
 * The larger beaker with some copper residue
 * The copper pretty much settled but you can
 * Carefully draining the water. || [[image:写真（2011-04-26_12.18）_#5.jpg width="256" height="192"]] ||  ||
 * More than water is being lost here.
 * About 10 mL of 3M hydrochloric acid
 * Already the mixture's colour is changing. || [[image:写真（2011-04-26_12.34）.jpg width="256" height="192"]] ||  ||
 * Turning green. || [[image:写真（2011-04-26_12.34）_#4.jpg width="256" height="192"]] ||  ||
 * Now almost a clear blue. || [[image:写真（2011-04-26_12.35）.jpg width="256" height="192"]] ||  ||
 * Oops! We started burning it before we added
 * About 20mL of 0.5M sodium phosphate
 * Now, we burn it.
 * the mixture was very thick, perhaps because

It was boiling when we took it off. || ||   || still stuck to the stirring rod. || ||   || with boiling water to try to remove all of the copper and add it to our filter. || ||   || It rinsed our copper from the filter paper. || ||   || into beaker #1. || ||   || into the filter paper. || ||   || blue copper dissolved and filtrated. || ||   || funnel to the beaker and the liquid kept bouncing out. We elevated the beaker to try to stop losing any more of our copper. || ||   || our filter paper. || ||   || yellow-er. || ||   || stopped producing bubbles! || ||   || together. || ||   || (inside of the black part was also red) ||  ||   || (to check if there are some zinc left inside the black part.) || ||   || heat it with bunsen burner to keep boiling it. then put the plate on the beaker to help the left water to evaporate. || ||   ||
 * Beginning of filtration. || [[image:写真（2011-04-26_12.48）_#2.jpg width="256" height="192"]] ||  ||
 * It's a bright cyan blue. || [[image:写真（2011-04-26_13.00）.jpg width="256" height="192"]] ||  ||
 * You can see some of the blue stuff
 * This was after we rinsed the beaker twice
 * The salt from the decant || [[image:写真（2011-04-28_12.32）_#3.jpg width="256" height="192"]] ||  ||
 * Measuring 50mL of 0.4M sulfuric acid. || [[image:写真（2011-04-28_12.38）.jpg width="256" height="192"]] ||  ||
 * Adding the acid to our cyan-blue solid.
 * The copper mixed with the acid now dripping
 * The liquid's almost gone. || [[image:写真（2011-04-28_12.44）.jpg width="256" height="192"]] ||  ||
 * We took beaker #2, switched it with beaker
 * 1, and poured the contents of beaker #1
 * We had to keep repeating until all the solid
 * Repeat. || [[image:写真（2011-04-28_12.54）.jpg width="256" height="192"]] ||  ||
 * The drop was too far from the bottom of the
 * Final (fourth) filtration! || [[image:写真（2011-04-28_13.13）.jpg width="256" height="192"]] ||  ||
 * Nanaka visited our lab! || [[image:写真（2011-05-04_12.26）.jpg width="256" height="192"]] ||  ||
 * The dried salt from the very first filter. || [[image:写真（2011-05-04_12.27）_#2.jpg width="256" height="192"]] ||  ||
 * Some of our copper was still on the edges of
 * Zinc: mass: 1.8g || [[image:写真（2011-05-04_12.29）_#3.jpg width="256" height="192"]] ||  ||
 * Dropping the zinc into our copper/acid solution. || [[image:写真（2011-05-04_12.29）_#4.jpg width="256" height="192"]] ||  ||
 * They started bubbling(releasing gas). || [[image:写真（2011-05-04_12.30）_#3.jpg width="256" height="192"]] ||  ||
 * The tone of the solution became slightly
 * The zinc changed its form after awhile and
 * +Four || [[image:写真（2011-05-04_13.03）_#2.jpg width="256" height="192"]] ||  ||
 * In you go! || [[image:写真（2011-05-04_13.03）_#3.jpg width="256" height="192"]] ||  ||
 * Some of the zinc pieces seem to have stuck
 * Some zinc became black, some became red.
 * From top. || [[image:写真（2011-05-06_12.18）.jpg width="256" height="192"]] ||  ||
 * with a sun light (easier to see) || [[image:写真（2011-05-06_12.21）.jpg width="256" height="192"]] ||  ||
 * some zinc were not completely dissolved. || [[image:写真（2011-05-06_12.26）_#4.jpg width="256" height="192"]] ||  ||
 * We broke the black part
 * From top. || [[image:写真（2011-05-12_13.16）_#3.jpg width="256" height="192"]] ||  ||
 * Decanting || [[image:写真（2011-05-12_13.18）.jpg width="256" height="192"]] ||  ||
 * Continue decanting || [[image:写真（2011-05-12_13.19）.jpg width="256" height="192"]] ||  ||
 * Decanted water. || [[image:写真（2011-05-12_13.19）_#2.jpg width="256" height="192"]] ||  ||
 * || [[image:写真（2011-05-12_13.19）_#3.jpg width="256" height="192"]] ||  ||
 * No more zinc inside. || [[image:写真（2011-05-16_13.13）_#2.jpg width="256" height="192"]] ||  ||
 * Decanting || [[image:写真（2011-05-16_13.16）.jpg width="256" height="192"]] ||  ||
 * After finished decanting, added water and acid there. || [[image:写真（2011-05-16_13.18）.jpg width="256" height="192"]] ||  ||
 * After 2 days.. || [[image:写真（2011-05-20_12.05）.jpg width="256" height="192"]] ||  ||
 * Decant again || [[image:写真（2011-05-20_12.09）_#2.jpg width="256" height="192"]] ||  ||
 * After decanting, move them to a dry plate. || [[image:写真（2011-05-20_12.20）.jpg width="256" height="192"]] ||  ||
 * Boil water || [[image:写真（2011-05-20_12.14）_#2.jpg width="256" height="192"]] ||  ||
 * Put the boiling water inside a beaker and
 * After the water is completely evaporated. || [[image:写真（2011-05-20_12.49）.jpg width="256" height="192"]] ||  ||