Iodine reacts with a ketone in aqueous solution to give an iodoketone. The stoichiometric equation is I2 + ketone S iodoketone + H+ + I-. The rate of the reaction can be measured by measuring the disappearance of I2 with time. Some data for initial rates and initial concentrations follow: " d [I 2 ]> dt (mol " 1 L s–1) [I 2 ] (mol L " 1 ) [ketone] (mol L " 1 ) [H # ] (mol L " 1 ) 7 * 10 -5 5 * 10 -4 0.2 1.0 * 10 -2 7 * 10 -5 3 * 10 -4 0.2 1.0 * 10 -2 1.7 * 10 -4 5 * 10 -4 0.5 1.0 * 10 -2 5.4 * 10 -4 5 * 10 -4 0.5 3.2 * 10 -2 a. Find the order of the reaction with respect to I2, ketone, and H+ . b. Write a differential equation expressing your findings in part (a) and calculate the average rate coefficient. c. How long will it take to synthesize 10 -4 mol L -1 of the iodoketone starting with 0.5 mol L -1 of ketone and 10 -3 mol L -1 of I 2 if the H + concentration is held constant at 10 -1 mol L -1 ? Will the reaction go faster if we double the concentration of ketone? Of iodine? Of H + ? How long will it take to synthesize 10 -1 mol L -1 of the iodoketone if all conditions are the same as above?

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.

lab safety rules

explanation: