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Calculate the pH of a solution which contains 2.0 x 10-3 M sodium acetate and 3.3 x 10-2 M acetic acid in a liter solution. The pKa is 4.74.
What is the ratio of the salt & acid concentration if the solution has a pH of 4.5 & pKa of 4.76?
Calculate the pH of a solution which contains 3.7 x10−2 mole of HAc & 4.8 x 10−2 mole of Na Ac in a liter of solution containing pka 9.26.
A buffer is prepared using 0.28 M HNO2 and 0.23 M NO2 − . The pKa for HNO2 is 3.34. What is the pH of
this buffer after the addition of 0.05 M HCl?
Mr. Narayan understands that among the 10 items, the items that are referred by odd index are not available in market. Help Mr. Narayan to convert the price of all odd index item to zero (0).
The country Autarka does not allow international trade. In Autarka, you
can buy a wool suit for 3 ounces of gold. Meanwhile, in neighboring countries,
you can buy the same suit for 2 ounces of gold. If Autarka were to allow free trade,
would it import or export wool suits? Why?
In designing a radio tower at an airport, engineers must take into account the ascent rate (slope at which a plane can take off) such that planes will not collide with the tower. If the most shallow ascent rate is found to be 9% (the plane climbs vertically 9 ft for every 100 ft of horizontal travel), and the tower is 300 ft tall, how far can the tower be safely placed from the end of the runway?
How does evolutionary forces (e.g. mutation,genetic, drift,gene,flow etc.)contribute biological variations of species at present?
Why are fossils records uses as a good evidence for evolution?
How can domestic breeding contradict with darwins theory on Natural Selection?
#340153 on Dec 2023