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The small bags of silica gel you often see in a new shoe box are placed there to control humidity. Despite its name, silica gel is a solid. It is a chemically inert, highly porous, amorphous form of SiO2. Water vapor readily adsorbs onto the surface of silica gel, so it acts as a desiccant. Despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided, you should be able to make an educated guess about the thermodynamic characteristics of the process. Predict the signs of ?G, ?H, and ?S.
If the volume of an unknown liquid is measured and found to be 6.510 L, what is the volume of the unknown liquid in milliliters?
The lab is synthesis of Methyl Red. The question is that diazonium salts cople with phenols in slightly alkaline solution. What effect does the PH of the solution have on reactivity of the phenol
There are three containers all connected to each other. There are a total of six particles inside the containers, two in one container, four in another container, the third container is empty. Upon changing the conditions,
How many L of O2 gas at STP, are needed to react with 15.0 g of Na using the following chemical reaction: 2Na(s) + O2(g) => 2NaO(s)?
What is the mole fraction of methane in the mixture? (Assume that the water produced by the combustion is in the gaseous state.)
The next three (3) problems deal with the titration of 331 mL of 0.501 M carbonic acid (H2CO3) (Ka1 = 4.3 x 10-7, Ka2 = 5.6 x 10-11) with 1.5 M KOH.
Reactions within equations and properties of acidity, A reaction occurs for each of the following below. How do you differentiate between the different driving forces? (a driving force can either be the transfer of electrons; the formation of a pr..
Direct reaction of sodium metal with O2(g) leads to sodium peroxide, Na2O2, which contains a peroxide complex anion and is diamagnetic. Direct reaction of potassium metal with O2(g) leads to potassium superoxide, KO2, which contains a superoxide c..
The equilibrium constant for a reaction is 0.38 at 25 °C. What is the value of ?G° (kJ/mol) at this temperature
0.015 M solution of hydrogen cyanate (HOCN) has a pH of 2.67. What is the hydronium ion concentration in the solution and the ionization constant, Ka, for the acid
There is a mixture that is soluble only in methylene chloride. I wanna run the column in 10% Ethyl acetate/hexanes. Which method of column loading should I use in this case and why?
Solid Ba(MNO4)2 is in equilibrium in a solution of KMNO4. What concentration of KMNO4 is needed to establish a concentration of 2.0 x 10-8 for the Ba 2+ ion in solution?
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