Three test tubes where number 1-3, the first and second test tubes (#1,#2) where mark at 1cm and 5cm from the bottom of the test tube while test tube #3 was mark at 3cm and 7cm. Test tube #1 was filled up to the 1cm mark with distilled water and to 5cm with Hydrogen peroxide. The substance was swirl for 30 seconds and the height of the bubbles column where recorded. Test tube #2 was fill up to the 1cm mark with catalase and to the 5cm mark with hydrogen peroxide. The substance was swirl for 30 second and the height of the bubbles column where recorded.…
This lab makes use of the reaction excess powdered calcium carbonate and different concentrations limiting hydrochloric acid in order to determine the effect of changing concentration on the rate of the reaction. Students will carry out 3 trials of 5 experiments each trial. The five different experiments are for the various concentrations of hydrochloric acid (0.2, 0.4, 0.6, 0.8, 1.0 mol/L). First measure out approximately 2 grams of powdered calcium carbonate using a weighing boat and analytical balance. Then, measure out 30 mL of 0.2 M hydrochloric acid into a volumetric flask.…
My group noticed that for Solution 1 the bubbles the were created were rather small and usually multiple were made. It was hard to make one large bubble and it usually lasted a short amount of time. The solution was also quite thin and sudzy. Solution 2 was a thin liquid and would also form multiple bubbles but there seemed to be an equal chance of making a small or large bubble. Solution 3 was a thick liquid and it usually made one large bubble…
Three drops of each liquid were put onto into the spots on the spot plate (with pH paper). 4. The color of the pH paper was noted to determine the pH of each substance. 5. A result of the pH level of each substance was recorded in an observation chart.…
A list was made for the purpose of knowing which unknown substances were mixed…
Make sure that you stir them evenly. Record 10 pieces of qualitative data and 2 quantitative data Qualitative Data: The substance is squishy. The substance is yellow.…
The liquids were; water, universal indicator, vinegar, and iodine. For example, when they mix the four liquids with the powder, one of the powders should have the exact same chemical and physical reactions as the mystery powder does. If none of the powders match the…
When beginning the experiment we observed and recorded the appearance of the materials in use like instructed. We weighed our materials out on a tared scale and placed them all in their corresponding test tube. We mixed and centrifuged our solution all three times for the appropriate times and decanted them accordingly. After getting all our liquid we heated up until a white solid formed, waited for it cool…
Following this, the administrator is to add 10 mL of Na2CO3 to the flask containing 20 mL of CaCl2, and 5 mL of the same solution to the flask containing 25 mL of CaCl2. While the administrator is waiting for the precipitate to form from the two mixtures, they should determine if there was a limiting reagent. When these solutions have formed a precipitate, they are to…
In the experiment 4-1 analysis of sand sample, the sand was classified in many ways. In this lab ___ had to determine the properties of five sand samples to compare them to the sand sample from the “crime scence.” The crime scene sand small little pieces of sand all the exact same size and when it was under the micropsope it was crystal and it look like the color of a rainbow but was the exact same. In sample one which was the Hawaii sand this sand was not a match to the crime scene because it had mixed sand with dark brown, light brown, a little bit of of white sand. In sample 2 which was Marco Island, Fl was not a match because even though it has white sand when it was under the polarized film half of them were crystallized and the other…
The substance was stirred until dissolved. The liquid solution produced a blue color as soon as the cupric sulfate dissolved. Prior to this 1.127 grams of Zinc was gathered along with Hydrochloric acid. Both the Zinc and Hydrochloric acid were poured in gradually creating a reaction. A stirring rod was used to stir this while the reaction occurred.…
Which one of the fo llowing is often easily separated into its components by simple techniques such l) as filtering or decanting? A) homogeneous mixture B) solutions 0 heterogeneous mixture D) elements E) compounds 2) An clement cannot 2) A) be part of a heterogeneous mixture Ji,) be a pure substance is corrccl for ___ _ 19) A) elements B) homogeneous mixtures Ohcterogeneous mixtures D) compounds 20) Which of the fo llowing is an example of a lieterogeneous mixture?…
In the two articals presented both sides make very valid points and arguments. The U.S shouldn't be able to tell you you have to do something you don't want to. This country is built and its structure is made of freedom and choice. we should have to do what we need and thats it such as going to school and also getting a good job that we can stay at for a long time. If we do eventually have to do manditory work for the state it should be something that will atleset make it somthing we want to do.…
The experiment that I will be conducting focuses on how fast one tablet of Alka seltzer can dissolve in various temperatures of water. The core of this procedure is to determine the impact that temperature has on how fast something dissolves. My hypothesis for this experiment would be that the Alka Seltzer that dissolves the fastest would be the one that was placed in the water with the highest temperature. There will be controlled and manipulated variables explained throughout the experiment. The two main things used in this experiment will be the solute and the solvent, which is Alka Seltzer and water.…
The metal ions BsCl and LiCl are in the unknown solutions A and B from the barrels on the vacant lot. 3. A student performed flame tests on several unknown substances and observed that all of the flame colors were shades of red. What could the student do to correctly identify these substances?…