![lashondrascott](/avatars/8317.jpg)
lashondrascott
06.12.2019 •
Chemistry
The active ingredient in aspirin is acetylsalicylic acid (mw = 180.2 g/mol). an aspirin tablet was dissolved in
water and titrated with 0.100 m naoh.
part a
if the titration required 14.85 ml of naoh to reach the phenolphthalein endpoint, how many milligrams of
acetylsalicylic acid were in the tablet?
Solved
Show answers
More tips
- C Computers and Internet How to Choose a Monitor?...
- S Style and Beauty How to Get Rid of Peeling Nails: Natural Remedies...
- S Science and Technology Understanding Magnetic Storms: A Guide to This Natural Phenomenon...
- F Family and Home What is Most Important in Men s Lives?...
- G Goods and services Which TV is better - LCD or Plasma?...
- C Computers and Internet Are there special gaming mice?...
- G Goods and services LED-подсветка в LCD-телевизорах: 5 причин, почему она лучше других технологий...
- C Computers and Internet Keep Your Mouse Pad Clean: The Right Way to Clean It?...
- C Computers and Internet 3D Glasses! What is this thing?...
- C Computers and Internet How to Reinstall Windows: A Detailed Guide for Beginners...
Answers on questions: Chemistry
- C Chemistry Examination reveals that 180.2 g/mol of glucose contains 72.1 grams of carbon, 96 g/mol of oxygen and the remainder is hydrogen. How many g of hydrogen are there in...
- E English Read the story. himself as he wanten om te last two children to exig was WOTIO coming to, anyway Reluctantly, the two latecomers turned away from the crowded window...
- H History Using the The Prince, explain Machiavelli s point of view concerning Gaining Power Maintaining Power Consolidating Power...
- H History How did the first great awakening contribute to the emergence of american identity?...
Ответ:
1214 mg
Explanation:
Data given
Volume of NaOH solution (V) = 14.85 mL
Molarity of NaOH solution (M) = 0.100 M NaOH.
Amount of acetylsalicylic acid = ?
Molecular weight = 180.2 g/mol
Solution:
It is a acid base titration
As equal amount of NaOH will neutralize equal amount of acetylsalicylic acid.
First find the moles of NaOH
As we know
M = moles of solute / 1 L x volume of solution
Rearrange and modify the above equation
moles of NaOH = M of NaOH x 1 L / volume of NaOH solution
Put values in above equation
moles of NaOH = 0.100 M x 1 L / 14.85 mL
moles of NaOH = 0.0067 moles
Now find to find the weight of acetylsalicylic acid
As
equal amount of NaOH will neutralize equal amount of acetylsalicylic acid.
moles of acetylsalicylic acid = moles of NaOH (1)
As we know
no. of moles = mass in g / molar mass
So,
The modified form of equation 1 will be
mass in g / molar mass (acetylsalicylic acid) = moles of NaOH
Put values in above equation
mass in g / 180.2 g/mol = 0.0067 moles
Rearrange the above equation
mass of acetylsalicylic acid = 0.0067 moles x 180.2 g/mol
mass of acetylsalicylic acid = 1.214 g
Convert the grams to milligrams
1 g = 1000 milligram
So,
1.214 g = 1214 mg
Ответ:
3.55 × 10n M n = -10