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hargunk329
14.03.2020 •
Chemistry
A Assuming the reaction is first order in sucrose, determine the mass of sucrose that is hydrolyzed when 2.50 LL of a 0.180 MM sucrose solution is allowed to react for 200 minmin .
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Ответ:
The question is incomplete, here is the complete question:
The hydrolysis of sucrose into glucose and fructose in acidic water has a rate constant of 1.8×10⁻⁴ s⁻¹ at 25°C. Assuming the reaction is first order in sucrose, determine the mass of sucrose that is hydrolyzed when 2.65 L of a 0.120 M sucrose solution is allowed to react for 200 min.
The mass of sucrose solution left is 12.56 grams
Explanation:
Molarity is calculated by using the equation:
Molarity of sucrose solution = 0.120 M
Volume of solution = 2.65 L
Rate law expression for first order kinetics is given by the equation:
where,
k = rate constant =![1.8\times 10^{-4}s^{-1}](/tpl/images/0547/4142/08bb7.png)
t = time taken for decay process = 200 min = (200 × 60) = 12000 seconds
[A] = amount left after decay process = ?
Putting values in above equation, we get:
To calculate the mass from given number of moles, we use the equation:
Moles of sucrose = 0.0367 moles
Molar mass of sucrose = 342.3 g/mol
Putting values in above equation, we get:
Hence, the mass of sucrose solution left is 12.56 grams
Ответ:
The two gases that make up most of the air in our atmosphere are nitrogen and oxygen.
Nitrogen makes up 78% of our atmosphere and oxygen makes up 21% of our atmosphere.