1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
MAVERICK [17]
3 years ago
15

In this experiment, you used phenolphthalein to monitor the neutralization reactions. describe the chemical differences between

an equivalence point and an endpoint in titration and use this to explain whether phenolphthalein could be used as an indicator in any acid/base neutralization.
Chemistry
1 answer:
viva [34]3 years ago
6 0
The endpoint in tiration is the point where an indicatior's halfway thru its color change. Equivalence point is where moles/stoichiometry of the system is satisfied (moles of reactants are equal to each other).

Titrating a strong acid with a strong base results in a salt that is neutral. Phenolphthalein changes color in the range <span>8.3 – 10. It is very easy to spot the change as it is colorless in acidic (< 8.3) and pink in basic (> 10).

pH will rapidly change near titration equivalence point. </span><span>Only one drop of the titrant causes this large change, the color change of phenolphthalein does not occur on the equivalence point, but IT IS within about 1 drop. <span>It would be considered an "acceptable uncertainty" in using titration to determine concentration by volumetric measurement.</span></span>

You might be interested in
A cylinder with 10 mL of coconut oil has a mass of 9.3 g. What is the density of the oil? Round to the nearest hundredth. ​
lakkis [162]

Answer:

0.93 grams per milliliter

Explanation:

Density is the division of mass by volume. It is how "hefty" an object is; for example, wood isn't very "hefty" but metal is. The density is measured in mass over volume, so it is 9.3/10. After applying units, it is 0.93 grams per milliliter.

6 0
3 years ago
Iron forms rust, expressed as Fe2O3.
Elina [12.6K]

Answer:

it's C. 159.70 g

Explanation:

hopefully that helps

3 0
3 years ago
Americans eat too much salt (NaCl). A healthy adult should eat no more than 6 g of salt in one day. Use this information to answ
Rufina [12.5K]

Answer:

a. 58.5 g/mol

b. 0.1 mol

Explanation:

a.

The molar mass of Na is 23.0 g/mol. The molar mass of Cl is 35.5 g/mol. The molar mass of NaCl is:

M(Na) + M(Cl) = 23.0 g/mol + 35.5 g/mol = 58.5 g/mol

b. A healthy adult should eat no more than 6 g of salt in one day. The moles corresponding to 6 g of NaCl are:

6 g × (1 mol/58.5 g) = 0.1 mol

7 0
3 years ago
if an object has a mass of 60 grams in a volume of 120 cm3 then calculate the density would this object sink or float
Ivanshal [37]

Answer: 0.5 g/cm^3

Density equals mass divided by volume so..

60/120 is 0.5 g/cm^3

7 0
2 years ago
1. Pollutants are very unstable molecules. Do you think N, and O2 are
Paraphin [41]

Answer:

A molecule is stable when there is no energetically-accessible mechanism available that allows it to reacts and form a more stable molecule or molecules whiles Are configuration of unknown atomic nuclei and electrons discovered by Reed Richard

4 0
2 years ago
Other questions:
  • If a human cell were to increase the amount of cholesterol embedded within its plasma membrane, which of the following would mos
    14·2 answers
  • What is the volume of 220 grams of an object with a density 55g/cm3
    10·1 answer
  • What evidence exists to support the idea that the composition of ocean water includes dissolved oxygen?
    9·2 answers
  • Which of the following is correctly balanced redox half reaction? Group of answer choices A. 14H+ + 9e- + Cr2O72- ⟶ Cr3+ + 7H2O
    13·1 answer
  • A chemist have to fill a 500 mL beaker with saturated solution of sodium nitrate and water at room temperature. How could the ch
    6·2 answers
  • 8. Classify each of the following changes as physical or chemical: (a) coal burning (b) ice melting (c) mixing chocolate syrup w
    14·1 answer
  • Show bond formation in magnesium chloride​
    12·1 answer
  • 52.0 g of LiCl represents ______ moles of LiCl
    6·1 answer
  • According to one acid base theory a base is an 1, h2 acceptor 2, h2 donor 3, h+ acceptor 4,h+ donor
    13·1 answer
  • The volume of 0.6305 kg of a liquid is 0.430 L. What is its density in g/mL
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!