Lab 103 - Study guides, Class notes & Summaries

CHEM 103 Lab Exam 4 – Portage Learning. Does the following reaction give off heat or absorb heat? Explain briefly. C D H = +263Kcal/mol 3. (4 points) In one experiment in the video, room temperature water was mixed with water at about 38 degrees. To what temperature (about) did the mixture of the two water samples come to after setting for a few minutes? Answer: 1. The heat depends on the amount of substance. If the amount of substance is doubled, then the heat doubles. Other propertie...

CHEM 103 Lab Report 6 Bonding by BP, solubilit (GRADED A) Latest Update (100% Correct Elaborations)

CHEM 103 LAB 2 CHEMICAL REACTION | Chemistry Lab Report CHEM 103 LAB 2 CHEMICAL REACTION | Chemistry Lab Report CHEM 103 LAB 2 CHEMICAL REACTION | Chemistry Lab Report

CHEM 103 Lab Report 7 Molality Colligative Pro (GRADED A) Latest Update (100% Correct Elaborations)

Bonds within a molecule are called intra-molecular bonds. Non-polar (type) compounds are insoluble in water. intra-molecular Correct! Non-polar Correct! Question 2 10 / 10 pts Fill in the blanks: Pentane is insoluble in water because it is a/an nonpolar (type) compound. Ethyl alcohol has a boiling point of 76.4 C and n-propyl chloride has a lower boiling point of 46.3 C because the Hydrogen bonds holding ethyl alcohol together are stronger than the nonpolar bonds which hold n-propyl chl...

CHEM 103 Lab Exam 3 – Portage Learning. A 1.1000 gram hydrate sample chosen from Na2CO3∙10H2O, AlCl3∙6H2O, MgCl2∙6H2O and BaCl2∙2H2O was heated and found to lose 0.5841 gram of H2O. (1) Show the calculation of the % H2O in the unknown hydrate sample. (2) Show the calculation of the % H2O in each of the hydrate compounds and identify the unknown hydrate from the list. Atomic weights: H = 1.008, O = 16.00. MWs: Na2CO3∙10H2O = 286.15, AlCl3∙6H2O = 241.43, MgCl2∙6H2O = 203.301 ...

CHEM 103 LAB 2 CHEMICAL REACTION | Chemistry Lab Report CHEM 103 LAB 2 CHEMICAL REACTION | Chemistry Lab Report

1. (3 points) In this experiment, what solvent was placed in the test tube? 2. (4 points) Why was warming data used for estimating the freezing/melting point of the cyclohexane? 3. (3 points) In this experiment, how long was the melting process observed? 1. cyclohexane 2. Solids tend to supercool, which gives false data. So, warming data gives a better approximation of freezing/melting point. 3. 8 minutes

Which of the following statements about a beaker is/are true? - ANSWERA 50 mL beaker is more precise than a 250 mL beaker. Which of the following glassware does not have volume markings that increase from the top to bottom of the instrument? - ANSWER100 mL Volumetric Flask Which of the following is not a good balance practice? - ANSWERPress the Tare button when you are about to take a mass reading. A new measuring device has markings every 0.01 mL. Which of the following would be an app...

CHEM 103 LAB 2 Chemical Reaction Entry Notebook CHEM 103 LAB 2 Chemical Reaction Entry Notebook CHEM 103 LAB 2 Chemical Reaction Entry Notebook