Chemistry Calorimetry experiment questions
1. Why is dissolving of ammonium chloride endothermic? would you get similar results for dissolving all salts? explain your answer using another salt as an example.
2. Suppose the calorimeter used for this experiment had been made of a heat-conducting material (such as metal) rather than styrofoam. Would the measured calorimeter constant be larger or smaller. Explain your answer.
3. Why do you use the heat capacity of 2.5M NaCl solution rather than the heat capacities of the original acid and base solutions?

Consider an experiment with four independent variables: A, B, C, and D.

Factor A has 3 levels and is a between-subjects variable; Factor B has 2 levels and is a within-subjects variable; Factor C has 2 levels and is a between-subjects variable; Factor D has 3 levels and is a within-subjects variable.

1. How many “cells” or “conditions” or “groups” are there in this experiment?

2. If you want to test 10 participants per cell, how many TOTAL participants will you need?

3. Identify ALL of the effects to be tested via ANOVA

In a chemistry experiment , 2ml of 5% sodium hypochlorite, 2ml of 3M KBr and 2ml of 3M KI are individually put to a 150 ml test tube(separately). then 10 ml of cyclohexane is added to all three tes tubes and shaked. then after that the 6M hcl, 8M Hno3, 8M Hno3 are respectively added to the 1st, 2nd and third solutions. After that the test tubes are pit on a hot water bath to increase the reactions for the second and third solitions. Explain thoroughly about the use of the experiment ,all the color changes, the layer formed, everything?

In this experiment, you will have to prepare your dosing solutions. Look at the plate layout from your experiment and assume that you need 100 µL of dosing solution per well when dosing 16 wells (this already includes ample surplus) per concentration. Calculate how much MeOH and media is required for each solution.


0% MeOH




1% MeOH

5% MeOH




10% MeOH




20% MeOH




40% MeOH




70% MeOH (double the volume, since you use this dosing solution in your dead wells and your negative control)

1. Earlier research has implicated the BMP4 gene as being important in the shape of birds’ beaks. A Genome Wide Association Study of beak shape in finches from the Galapagos Islands identified a number of loci that contribute to beak shape in finch species but BMP4 was not among the candidate genes identified in that study.
   1. Speculate about why BMP4 was not found in the GWAS experiment.

2. As the genome sequence for the finches studied in the GWAS experiment is now publicly available, how could you use the sequence to determine whether or not BMP4 is involved in beak shape differences in finches?

Example 4: A fair six-sided die is rolled six times. If the face numbered k is the outcome on roll k for k = 1, 2, 3, 4, 5, 6 we say that a match has occurred. The experiment is called a success if at least one match occurs during the six trials. Otherwise, the experiment is called a failure. The outcome space is O = {success, failure}. Let event A = {success}. Which value has P(A)?

**This question has been posted a few times on here, but the answers were not good explanations**

Critical Thinking:

1- What is the value of questions that arise during an experiment process?

2- Why would it be a problem to use only on resource when conducting research for a scientific experiment?

3- A food scientist bakes one cookie dough sample at 350F for 13 minutes and a second sample at 375F for 11 minutes. What is the problem with the scientist's procedure?

4- What would happen if a researcher failed to realize a thermometer he was using has both Celsius and Fahrenheit scales?

5- Explain how the measurements for length and volume are related

Consider two independent experiments testing for two different and independent genetic mutations in rabbits. •

•Experiment A: Tests 12 rabbits for a mutation that occurs with probability 0.1. Let X be the number of these rabbits w/ this mutation.

• Experiment B: Tests 16 rabbits for a mutation that occurs with probability 0.25. Let Y be the number of these rabbits w/ this mutation.

(a) Compute P(X ≤ 6)

(b) Compute P(10 ≤ Y ).

(c) Compute the joint probability P(X = 4, Y = 6).

(d) Compute the joint probability P(X ≤ 3 and Y ≤ 4).