Question

The experimental procedure requires that you wash your thermometer and dry it after you measure the...

The experimental procedure requires that you wash your thermometer and dry it after you measure the temperature of the NaOH solution and before you measure the temperature of the HCl solution. Why?

Homework Answers

Answer #1

After measuring the temperature of NaOH solution, some NaOH remains on the tip of the thermometer. When you insert this thermometer in HCl solution (to measure temperature), some of HCl will be neutralised with NaOH. This results in an error. Also, when you wash the thermometer but do not dry it, some water will be added to HCl solution. This will increase total mass of HCl solution and the total mass of mixture of HCl and NaOH. This will cause an error in the formula

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
b. The experimental procedure instructs you to add 35 mL of H2SO4 very slowly to your...
b. The experimental procedure instructs you to add 35 mL of H2SO4 very slowly to your solution. Why do you think it is important to slowly add the acid as opposed to quickly pouring it into the solution?
A 50.0g thermometer is used to measure the temperature of 100 mL of water. The specific...
A 50.0g thermometer is used to measure the temperature of 100 mL of water. The specific heat of the thermometer, which is mostly glass, is 750J/(kgK), and it reads 18.0 ?C while lying on the table. After being completely immersed in the water, the thermometer's reading stabilizes at 77.4 ?C. What was the actual water temperature before it was measured?
Answer the procedure below. You will start with a 50mM solution of your amino acid in...
Answer the procedure below. You will start with a 50mM solution of your amino acid in 100mL of water. How many grams (and moles) of asparagine will you need? Assuming a start at about pH of 6-7, how many equivalents of HClwill you need to add to ensure that the fully protonated form predominates (predict the pH youwill attain)? What volume of 1M HCl solution could you add to do this? How many equivalents of NaOH will you add per...
I am to conduct an experiment based on methyl ester methionine. There's an experimental procedure that...
I am to conduct an experiment based on methyl ester methionine. There's an experimental procedure that I am to follow. The procedure states that they used a 1 to 1 equivalent, 5.9 grams of 33mM methyl ester of Methionine. I am to follow this except I have l-methyl ester of methionine hcl that is 98% (assuming 98 g of l-methyl ester methionine hcl over 100 g of solution). How do I figure out the amount of l-methyl esther methionine hcl...
2. You are about to do the following experimental procedure: a. Add 0.35 ml of 1-hexene...
2. You are about to do the following experimental procedure: a. Add 0.35 ml of 1-hexene to a 15 ml reaction tube. Working in the hood, add 1.0 ml of 30% HBr in acetic acid (5 M) tothe tube. Cap the tube and shake it frequently for 10 min. Occasionally loosen the cap to release any buildup of pressure.Write a chemical equation that representsthe reaction that occurs. Draw the structure of reactants and products. What is the function of the...
Health and safety guidelines of the organisation dictate that all staff and clients are to wash...
Health and safety guidelines of the organisation dictate that all staff and clients are to wash their hands before handing food. You notice there is no procedure on the washing of hands. You advise your manager, who asks you to write a procedure for washing hands. a. Write a procedure on washing hands. b. Why would you show your manager the procedure before showing it to the staff and clients? c. Why would you ask for feedback from staff and...
In your Gravimetric Chloride lab, you had to wash the AgCl precipitate with wash water to...
In your Gravimetric Chloride lab, you had to wash the AgCl precipitate with wash water to minimize the adsorption of the Ag ions. If you had used 30.5 ml of pure water to wash 0.3333 grams of AgCl precipitate and this wash liquid only had the time to become 75.0% saturated with AgCl, how mnay grams of AgCl would you wash away? Ksp for AgCl = 1.8 x 10-10 Also, what % error too low would you be in your...
Procedure You will be provided with a mixture of TWO of the following three organic components...
Procedure You will be provided with a mixture of TWO of the following three organic components dissolved in diethyl ether. If present, they are present at the concentrations given below: Benzoic acid, 0.20 M Ethyl – 4-aminobenzoate, 0.20 M Acetanilide, 0.20 M Your goals are: (1) determine which of the above four molecules are present in the sample that was given to you and (2) isolate a sufficient quantity to determine a melting point and hand in a product. You...
1.How would each of the following modifications to the experimental procedure used in this investigation affect...
1.How would each of the following modifications to the experimental procedure used in this investigation affect the mass of product obtained? Indicate if the mass of product would be greater, less, or unchanged. Explain your reasoning. (a) The KI solution is added to the Pb(NO3)2 solution instead of adding the Pb(NO3)2 solution to the KI solution. (b) The temperature of the reactant solutions is 40 oC instead of room temperature. (c) The residue is washed with hot distilled water instead...
PROCEDURE You will be provided with a mixture of two of the following four organic components...
PROCEDURE You will be provided with a mixture of two of the following four organic components dissolved in methyl tert-butyl ether. If present, they are present at the concentrations given below: • benzoic acid, 0.200 M • ethyl – 4 – aminobenzoate, 0.200 M • naphthalene, 0.200 M Your goals are: (1) to determine which of the above four molecules are present in the sample that was provided to you and (2) to isolate a sufficient quantity to determine a...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT