A chemistry graduate student is given 300.mL of a 1.10M hydrocyanic acid  (HCN) solution. Hydrocyanic acid is a weak acid with =Ka×4.9*10^−10. What mass of NaCN should the student dissolve in the HCN solution to turn it into a buffer with pH =9.24? You may assume that the volume of the solution doesn't change when the  NaCN is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.

Question

A chemistry graduate student is given 300.mL of a 1.10M hydrocyanic acid 

(HCN) solution. Hydrocyanic acid is a weak acid with =Ka×4.9*10^−10. What mass of NaCN should the student dissolve in the HCN solution to turn it into a buffer with pH =9.24?

You may assume that the volume of the solution doesn't change when the 

NaCN is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.

 

Expert Answer

Want to see the step-by-step answer?

See Answer

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

See Answer
*Response times vary by subject and question complexity. Median response time is 34 minutes and may be longer for new subjects.

Related Chemistry Q&A

Find answers to questions asked by student like you

Q: Ammonium perchlorate (NH4ClO4) is the solid rocket fuel used by the U.S. Space Shuttle. It reacts wi...

A: The given reaction as follows,

Q: An analytical chemist is titrating 134.4mL of a 0.6500M solution of nitrous acid HNO2 with a 0.7300M...

A: The molarity of an unknown solution can be determined by titrating it with a known solution by using...

Q: What is the difference between Uranium-235 and uranium -238? Which one is more desirable ? What perc...

A: Difference between Uranium-235 and uranium -238 :Uranium is a radioactive element and symbolised as ...

Q: Complete and balance the following combustion reaction. C2H6O(l) + O2(g) ------>

A: The combustion reaction is given as,

Q: a 0.100 M solution of an acid is 6% ionized calculate the acid ionization constant for this acid

A: The ionization of the acid can be represented as follows,

Q: During a breath, the average human lung expands about 0.50L. If this expansion occcurs against an ex...

A: Work in thermodynamics is the amount of energy that is transferred from one system to another system...

Q: Which substance functions as a reducing agent in the following reaction CH4+ 2O2-->CO2+ 2H2O

A: Given information:

Q: 2.25 g of C6H12O6 is burned in a bomb calorimeter containing 550. g of water and the temperature inc...

A: Given,Mass of C6H12O6 = 2.25 gMass of water = 550 gInitial temperature = 25.0oCFinal temperature = 3...

Q: If a human were quantized in 1 foot increments, what would happen to the height of a child as she gr...

A: Quantization is the concept that a physical quantity can have only certain discrete values.