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Phenolphthalein has a pKa of 9.7. It is colorless in its acid form and pink in its basic form. For each of the pH's listed, calculate the ratio and predict the color of a phenolphthalein solution.
a. pH = 2.0
b. pH = 5.0
c. pH = 8.0
d. pH = 11.0
identify any intermediatesin the mechanism. write the rate law for each elementary reactionin the mechanism. D) if the first step is slow and the second one is fast
1.00 g of NH4Cl (s) is completely decomposed by heating to 325 °C at 1.00 atm. What volume of gas will be produced? NH4Cl (s)= HCl(g) + NH3(g)
Find the name of hazardous chemicals and write formula and how will handle these hazardeous chemical in the lab from below ammonia, bleach, dish detergent, hand sanitizer, hand soap, lemon juice, shampoo, codium bicarbonate, vinegar, sodium hydrox..
calorimetry can be used to find heats of combustion. suppose a calorimeter helps someone to determine that 4032 kj of heat is released during the combustion of 88.0 grams of propane, C3H8 (44.0 g/mol).
If a bottle of nail polish remover contains 181 mL of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788 g/mL.
Calculate the mass of HONH2 required to dissolve in enough water to make 250.0 ml of solution having a pHof 10.00 (Kb=1.1*10 (-8).
12.0 moles of gas are in a 5.00 L tank at 23.9 C. Calculate the difference in pressure between methane and an ideal gas under these conditions.
When maleic acid is heated to about 100C it forms maleic anhydride, however fumaric acid requires a much higher temperature (250-300C) before it dehydrates
A piece of metal with a mass of 151 g is placed in a 50 mL graduated cylinder. The water level rises from 20. mL to 35 mL. What is the density of the metal?
A flask contains 0.330 mol of liquid bromine, Br2. Determine the number of bromine molecules present in the flask.
A container consists of CO2 gas at a temperature of 15 C and at a pressure of .990 atmospheres. The volume of the container is 500 mL. How many grams of CO2 would be in the container?
Study of a first-order reaction, In the study of a first-order reaction, A--->B, it is found that A/Ao=0.125 after one hour. The system initially consisted of 0.20 mole of a gaseous A at 25 degrees C and 1 atm
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