Explain the formula:   Ccal ΔTcal + mCpΔTwater + qrxn = 0

Please write step by step on paper

Salicylic acid, HOC6H4CO2H, and its derivatives have been used as pain relievers for a long time. Salicylic acid occurs in small amounts in the leaves, bark, and roots of some vegetation (most notably historically in the bark of the willow tree). Extracts of these plants have been used as medications for centuries. The acid was first isolated in the laboratory in 1838. (a) Both functional groups of salicylic acid ionize in water, with Ka = 1.0 ×× 10−3 for the—CO2H group and 4.2 ×× 10−13 for the −OH group. What is the pH of a saturated solution of the acid (solubility = 1.8 g/L). (b) Aspirin was discovered as a result of efforts to produce a derivative of salicylic acid that would not be irritating to the stomach lining. Aspirin is acetylsalicylic acid, CH3CO2C6H4CO2H. The −CO2H functional group is still present, but its acidity is reduced, Ka = 3.0 ×× 10−4. What is the pH of a solution of aspirin with the same concentration as a saturated solution of salicylic acid (See Part a).

C28H37N10O23P3 How do you draw this structure?

Consider a neutralization consisting of 0.2 mol of NaOH and 0.1 mol of H2SO4. Calculate the enthalpy change per mole of NaOH assuming 20 kJ of heat was released. Calculate the enthalpy change per mole of H2SO4 assuming 20 kJ of heat was released.

H Br 1) (Ph)3P 2) n-BuLi Mgº ether

Which pair of ions will attract each other most strongly? Explain. Mg?+ O2- Al3+ O2- Na* 02- A B

The drawing below shows an example of 2+ 3+ OH2 OH2 H2O. 2Cr - H20 3CI H20 FOH2 H20 FOH2 OH2 hydration isomerism O ionization isomerism O linkage isomerism O stereoisomerism

Determine the formula unit for the compound formed when each pair of ions interacts. Al3+ and CN−:

What happens to H2O when ionic compounds are added to sodium polyacrylate gel?