Study the reaction scheme below in which compound Y is produced by the reaction of compound X with water - Leaving Cert Chemistry - Question 8 - 2021
Question 8
Study the reaction scheme below in which compound Y is produced by the reaction of compound X with water. Y is often called isopropyl alcohol and it is a component i... show full transcript
Worked Solution & Example Answer:Study the reaction scheme below in which compound Y is produced by the reaction of compound X with water - Leaving Cert Chemistry - Question 8 - 2021
Step 1
Express its concentration in terms of moles per litre of isopropyl alcohol.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
To find the concentration in moles per litre, follow these steps:
Calculate the volume of isopropyl alcohol in 100 cm³:
The sanitizer is 70% (v/v), hence:
70 cm3 CH3CH(OH)CH3 per 100 cm3
Calculate the volume of isopropyl alcohol in 1 litre:
700 cm3 CH3CH(OH)CH3 per litre
Calculate the mass of isopropyl alcohol:
Using density (0.8 g/cm³):
700 cm3×0.8 g/cm3=560 g CH3CH(OH)CH3 per litre
Calculate the number of moles of isopropyl alcohol:
The molar mass of isopropyl alcohol (C₃H₈O) is approximately 60.094 g/mol. Thus:
n=molar massmass=60.094 g/mol560 g≈9.3 moles per litre
Thus, the concentration of isopropyl alcohol is approximately 9.33 moles per litre.
Join the Leaving Cert students using SimpleStudy...