Identification of type of Chemical Reactions Skylar Scanlan Wednesday, January 25 Partner: Sarah Catirino Ms. Ciraco SNC2D Introduction Chemical reactions are a fundamental part of Chemistry and Science. This allows for determining what chemical reactions are safe and which are dangerous. This is significant because this can reveal important reactions and helps to understand various properties of substances. During this experiment, various chemicals will be mixed and their reactions will be identified along with the changes. The observations of the reactions will be displayed on a chart with three columns labelled; before reaction, after reaction, and proof of chemical reaction for the four reactions. During this experiment, …show more content…
The results of this chemical reaction produced gas and became cloudy and grainy. During Part 2 of this lab, Zinc reacts with Hydrochloric Acid to produce Zinc Chloride and Hydrogen gas. The skeletal equation for this reaction is Zn + HCL → ZnCl2 + H2 and the final balanced equation is Zn + 2HCL → ZnCl2 + H2. Observing this reaction shows that when Zinc reacts with Hydrochloric Acid the Zinc will begin bubbling upwards and form a fas. The Zinc produced a white smoke and the liquid became cloudy. During this reaction, the Zinc was also disintegrating. During Part 3 of this reaction Copper Sulfate and Zinc reacted with eachother to produce Zinc Sulphate. The word equation for this reaction is Copper Sulfate(aq) and Zinc (s) react to produce Zinc Sulphate (aq) and Copper (s). The Skeletal equation is CuSO4 + Zn → ZnSO4 → + Cu and the final balanced equation is CuSO4 + Zn → ZnSO4 → + Cu. During this reaction, the observations showed that after four minutes of the reactants being mixed together the liquid looked grainy. After 7 minutes a clear dark blue ring formed around the top of the liquid. The proof of a chemical reaction for the reactants is that the liquid began to precipitate.
An error that could have been present during the lab includes not letting the zinc react completely with the chloride ions by removing the penny too early from the solution. For instance, the percent error of this lab was 45.6%, which was determined by the subtraction of the theoretical percent of Cu 2.5% and the experimental percent of Cu 3.64% and dividing by the theoretical percent of Cu 2.5%. This experiment showed how reactants react with one another in a solution to drive a chemical reaction and the products that result from the
While the solution dissolved, 50 mL of distilled water was added to a 150 mL beaker and heated on the hot plate. When the solution started to boil 2.65 grams of Na2SiO3*5H2O was added to the beaker with a stir bar and heated to a gentle boil. When both solutions began to boil, the sodium silicate solution was slowly added to the sodium aluminate. The solution was kept at 900C for 60 minutes and stirred with stir bar. After 60 minutes, the zeolite solution was cooled for 5 minutes and for the magnetized zeolite , 0.78 grams of FeCl3 and 0.39 grams of FeSO4*7H2O was added to the flask and stirred until the iron parts dissolved.
Discussion 1. Zn0 (s)+ Cu2+S6+O42-(aq) →Cu0(s) + Zn2+S6+O42-(aq) Zn0(s) → Zn2+(aq) + 2e- Cu2+(aq) + 2e- → Cu0(s) Zn0(s) + Cu2+(aq) → Zn2+(aq) + Cu0(s) Oxidant (oxidizing agent) is the element which reduces in experiment.
This experiment investigated the properties of metals by seeing the reactivity of metals. The metals used in this experiment were lithium, sodium, potassium, magnesium, and calcium. What was the first chemical change observed in the lab? Explain.
CaCl2 and 5 mL water, 2 tsp. CaCl2 and 2 tsp. CaCl2.The question asked at the beginning of the lab was what chemical must be present for a color change to occur. My hypothesis was that if Phenol red was present then a color change would occur. This hypothesis was true because every reaction that had phenol red experienced a dramatic color change while the other reactions did not.
solid 1.0M Zinc sulfate - blue liquid Copper metal
This lab’s end result was to correctly identify each unknown solution using prior knowledge of chemical properties and the results of the first experiment conducted. Unknown solution D was the only colored solution, being blue while the others were clear. This made it easy to then match D up to Copper Sulfate because of its color. As unknown A and B were added together, lots of gaseous bubbles formed and revealed the fact that that reaction was the reaction between Hydrochloric Acid and Sodium Carbonate because it was the only reaction that produced a gas release. Unknown A and C produced the only yellow, brown precipitate just as the reaction between Sodium Carbonate and Silver Nitrate had previously.
a. Describe the reaction (describe your observations). 8. Pour the mixture into the waste container. 9. Fill out the claim-evidence-reasoning chart (at the back of this handout) answering the following question: a. What are the products of the decomposition of CuSO4
1. What type of macroscopic evidence for chemical change did you observe during this experiment? Give at least three different examples. (15 points)
When the substance reacted with the solution it turned from its initial color yellow/brown to its final color lilac/violet. The experiment went by easily flowing nicely, although one or two things went wrong, none had any effect on the experiment. It is very important to know what foods are composed of because, knowing what is inside our food is essential for our health. We need to be aware of what things we are consuming and what we should be consuming for our bodies to function properly.
when added water (H2O). The first step is to insert, the size of a pea, solid copper into a clean test tube. Think about what’s going to happen to the copper (II) sulphate when added water. Secondly, fill the test tube with copper (II) sulphate 2/3 full of
The equation for the reaction that is going to happen is: Magnesium + Hydrochloric Acid —> Magnesium chloride + Hydrogen Mg (s) + 2 HCl (aq) --> MgCl 2 (aq) + H 2 (g) This reaction is an Oxidation-reduction.
The zinc will form a new compound with the sulfate, and the copper will stay as a metal. Balanced Chemical
Throughout the experiment, copper was altered a total of 5 times, but after the final chemical reaction, solid, elemental copper returned. Each time the solution changed color, a precipitate formed, or when gas appeared, indicated that a chemical reaction was occurring. For the first reaction, copper was added to nitric acid, forming the aqueous copper (II) nitrate (where the copper went), along with liquid water, and
Q1 A reversible reaction is one which can go both ways. Reactants react to form products and products can form the reactants again. Under different conditions the reactants and products can still react but may just become a oneway reaction, however a reversible reaction will eventually reach a point of equilibrium where the products are reactant are produced at the same rate.