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"Besides the traditional colorimetric acid/base indicators, there is another class that doesn't use color, the olfactory acid-base indicators! These compounds smell or don't smell based on their pH and a lot of them are plant-derived compounds. For example, vanillin (C8H803), the active flavoring in vanilla flavoring or vanilla extract, is an olfactory acid base indicator. It loses it's characteristic smell when it is basic. The ka for vanillin is 1.79x10^-8.
You want to make a vanilla cake and give it that extra vanilla-ly flavor, you add exactly 1.00 g of pure vanillin (acid form, C3H7O3-) to 500.0 mL of cake batter. But, your roommate, trying to help, adds too much of the rising agent NaHCO3. He adds 5.0 grams. Will you be able to smell the vanillin in your cake? To anser this question, you need to determine how much of the protonated form of vanillin will be in cake batter. IF it is over 90%, then you will not be able to smell it!"
(C3H7O3)- + (HCO3)- = C3H8O3 + (CO3)2- The equal sign stands for the equilibrium arrows.
what is the ratio of the amplitude of damped oscillations.
A) How fast should the car be traveling just as it leaves the cliff in order to just clear the river and land safely on the opposite side? B) What is the speed of the car just before it lands safely on the other side?
A particle attached to a spring with k 50 N/m is undergoing simple harmonic motion, and its position is described by the equation x (5.7 m)cos(7.5t), with t measured in seconds.
What is the gravitational energy of stone-Earth System
A 2,700-kg satellite is in a circular orbit around a planet. The satellite travels with a constant speed of 6,270 m/s. The radius of the circular orbit is 8.72 × 10^6 m. What is the acceleration of satellite.
Three equal point charges, each with charge 1.15 , are placed at the vertices of an equilateral triangle whose sides are of length 0.600 . What is an electric potential energy of the system? (Take as zero the potential energy of the three charges ..
A 76kg student consumes 2500 Cal each day and stays the same weight. One day, he eats 3500 Cal and, wanting to keep from gaining weight, decides to "work off" the excess by jumping up and down.
If the skier's speed at point A in the figure below is 8.1 m/s, illustrate what is the normal force exerted by the snow on the skier at point B? Ignore frictional forces.
2 crewmen pull a raft, 1 crewman pulls with a force of 130 newtons at 34 degreees relative to the forward position on the raft. the 2nd crewman on the opposite side pulls at 45 degrees. Illustrate what force should the 2nd crewman pull so that the..
A piece of Nichrome wire has a radius of 5.00 x10-4 m. It is used in a laboratory to make a heater that uses 2.00 102 W of power when connected to a voltage source of 120 V. Ignoring an effect of temperature on resistance, estimate the necessary l..
illustrate a diagram to show the forces acting on the aircraft while it is flying in a horizontal circle with its wing banked at an angle to horizontal.
A potential difference of 81 mV exists between the inner and outer surfaces of a cell membrane. The inner surface is negative relative to the outer surface. How much work is required to eject a positive sodium ion (Na+) from the interior of the ce..
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