ZuoTi.Pro
Question

"If 2 drops are good, 20drops must be better!" Explain why this reasoning is not logical...

"If 2 drops are good, 20drops must be better!" Explain why this reasoning is not logical when adding phenolphthalein indicator for an endpoint determination.

science   chemistry   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

2 drops are sufficient for obtaining a end point in the volumetric analysis such as acid base titrimetry etc. This is because of the fact that here phenolphthalein is a indicator and it is used in the given titration to only indicate that reaction gets completed and nothing has its role with anyone concentration of analyte and titrant so why we add 20 drops for it . we only want a visual change by physically observing the different color at end point .

0 0
Add a comment
Know the answer?
Add Answer to:
"If 2 drops are good, 20drops must be better!" Explain why this reasoning is not logical...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • pl#3 QUESTION 1 A mixture of 0.810g of BaCl 2.2H 2O and Na 2SO 4 produces...

    pl#3 QUESTION 1 A mixture of 0.810g of BaCl 2.2H 2O and Na 2SO 4 produces 0.466g of BaSO 4, the limiting reactant in the reaction is Na 2SO 4. Calculate the percent of BaCl 2.2H 2O and Na 2SO 4 in the original mixture. QUESTION 2 Because of the finely divided nature of the Ba 3(PO 4) 2 precipitate, some of it passes through the filter and is not collected. How does this loss of precipitate affect the reported...

  • philosophy Question In simple terms a logical fallacy is an error in reasoning but, its a...

    philosophy Question In simple terms a logical fallacy is an error in reasoning but, its a little more than that it is believing in falsehoods or rejecting the truth. An example of logical fallacy that I can think of is in music. Sometimes when I go to concerts I will hear people argue about which brand is better. A common logical fallacy that occurs in the argument when one person says this band is better than another band simply because...

  • find the term isosbestic point.? [a. Explain why the isobestic point would be a poor choice...

    find the term isosbestic point.? [a. Explain why the isobestic point would be a poor choice of wavelength for determiningpKa? 5. Phenolphthalein is an indicator often used for weak acid-strong base titrations. The acid form of phenolphthalein is colorless and the base form is pink. Do you think the pKa of phenolphthalein would be determined using the same the method from this experiment to find the pKa for bromothymol blue? Explain why or why not? I dont need the answer...

  • why is it unnecessary to calibrate pipet when standardizing NaOH? the experiment procedure: We first drop...

    why is it unnecessary to calibrate pipet when standardizing NaOH? the experiment procedure: We first drop two drops of approximately 0.1M NaOH, and we add one drop of BTB indicator. This addition allows seeing when our titration has come to its endpoint. We are going to titrate the solution with 0.1M HCl by adding it one drop by one drop to the same well. As we reach the endpoint, the color changes to yellow.

  • Is GDP a good indicator of a country’s wealth? Why or why not? Explain.

    Is GDP a good indicator of a country’s wealth? Why or why not? Explain.

  • Consider the reaction H2(g) + Cl2(g) ⇌ 2HCl(g) which of the following stresses will cause the...

    Consider the reaction H2(g) + Cl2(g) ⇌ 2HCl(g) which of the following stresses will cause the reaction shift in the forward direction? a. decreasing the pressure b. removing some HCl(g) c. increasing the pressure d. removing some H2(g) Consider the reaction N2(g)+2O2(g)→2NO2(g), which stress will cause the reaction shift to the left a. increasing the pressure b. removing some NO2(g) c. adding a catalyst d. decreasing the pressure Phenolphthalein is an indicator with a pH range from 8.3 to 10.0....

  • 1. Explain the difference between inductive and deductive reasoning in terms of why deductive reasoning is more appropriate for positivist research 2. Explain why analysing scientific research da...

    1. Explain the difference between inductive and deductive reasoning in terms of why deductive reasoning is more appropriate for positivist research 2. Explain why analysing scientific research data is not just about descriptions but about explanations. 3. Discuss the experimental method in terms of its role in a positivist research exercise. 4. Discuss the purpose of the theoretical framework in terms of its function as a lens. 1. Explain the difference between inductive and deductive reasoning in terms of why...

  • Part 2: Logical Reasoning Briefly write the explanation for the following statements with valid reasons: •...

    Part 2: Logical Reasoning Briefly write the explanation for the following statements with valid reasons: • Viscosity of liquid decreases with increase in temperature • Density of compressible fluids do not remain constant. • Rise or fall of the liquid occurs in the capillary tube. • Gauge pressure is zero when the water is flowing out of the nozzle. • Mercury is commonly used as a manometer liquid.

  • Questions 1). HCl is described as being a MONOPROTIC acid. What does that mean? 2) If...

    Questions 1). HCl is described as being a MONOPROTIC acid. What does that mean? 2) If a group forgot to add the phenolphthalein, how would they know when the acid was neutralized? 3) Explain the difference between the terms endpoint and equivalence point? Endpoint is the point at which the indicator changes its colour, on the other hand equivalence point is the point at which n 4) If we placed the Erlenmeyer flask over a Bunsen bumer and evaporated the...

  • Lab Questions 1. Explain what happens to the moles of H" in the flask when you...

    Lab Questions 1. Explain what happens to the moles of H" in the flask when you add boiled, deionized water to rinse the wall of the flask during the titration. Explain what happens to the moles of OH' needed from the buret to neutralize the acid after adding the water. What is the overall effect on the calculated acetic acid % of your sample? 2. Suppose that you do not add the water to rinse the wall of the flask,...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT