8. Often, the solubility of organic molecules can be influenced by changing the pH of a solution. Below are drawings of two dyes, Sudan Blue and Sudan Orange, at different pHs. Fill in the table to indicate if the dye will be soluble in dichloromethane (DCM) or water under each condition. pH = 12 `ΝΗ Ο "Ho org NH Sudan Blue pH = 7 `ΝΗ Ο pH = 2 ΝΗ Sudan Blue NH, O NH₂ Θ: Sudan Orange OH Sudan Orange OH OH OH pH = 12 pH = 7 pH = 2 Sudan Blue Sudan Orange

In general chemistry we taught you to calculate the pH of a solution if you know the H30+ concentration. We neglected to talk about the concept of "activity"; when other ions in solution affect the behavior of the your analyte (analytical target) ion. This behavior is what we refer to as the ion activity. Please note that this only applies to ions - charged species - not uncharged molecules. Using the chart of activity versus ionic strength found in chapter 8 (7th edition) of the text, answer the following for a solution that has the following concentrations: [HCI] = 0.0118 and [KNO3] = 0.017 1) - the activity coefficient of H30+ ions = 2) - the activity of H30+ ions 3) - neglecting activities the pH of the solution is = 3) - accounting for activities the pH of the solution is =

2. Given the H3PO4 - NaH₂PO4 buffer system, which of the following is false when KOH is added into the said solution? O The concentration of the H3PO4 will decrease upon addition of KOH. O The concentration of the H₂PO4 will decrease upon addition of KOH. O The concentration of the H₂PO4 will increase upon addition of KOH. O The [H₂PO4 ]/[H3PO4] will decrease due to the neutralization of the added KOH.

A buffered solution containing dissolved aniline, CH,NH,, and aniline hydrochloride, CH, NH, Cl, has a pH of 5.27. Determine the concentration of CH, NH in the solution if the concentration of CH, NH, is 0.275 M. The pK, of aniline is $ 9.13. [CH_NH] = = Calculate the change in pH of the solution, ApH, if 0.386 g NaOH is added to the buffer for a final volume of 1.35 L. Assume that any contribution of NaOH to the volume is negligible. ApH = M

For each of the following compounds, decide whether the compound's solubility in aqueous solution changes with pH. If the solubility does change, pick the pH at which you'd expect the highest solubility. You'll find Ksp data in the ALEKS Data tab. compound Does solubility change with highest solubility pH? pH = 6 pH = 4 pH = 3 ○ yes CaBr2 Ba(OH)2 yes no no CaCl₂ yes ○ no X S

You are on one of Saturn's many moons and discover a substance, Y2O that undergoes autoionization just like water on Earth.  Y2O + Y2O  ⇌ Y3O+ + OY– Through a series of experiments, you determine the equilibrium constant (Keq) for this autoionization reaction at various temperatures. The value of Keq at 28.7ºC is 7.6 x 10-14. What is the pY of the pure substance at this temperature? Report your answer to the hundreths place

Fill out the tables and find pH

5) Find the concentration of H30*(aq) in a 1.75 M solution of lactic acid, HC3H5O3, at 25°C. Ka= 1.38 x 10*. 6) Write the equilibrium expression for the ionization of HOI, and calculate the concentration of HOI(aq) in solution if [H3O*]=2.3 x 10° M and pKa = 10.7 at 25°C.

PLease help me asap and make sure your answer is correct and rounded only at the final answer !

50.0 mL of 0.100 M hydrochloric acid  moles of H+ is equal to 0.005 100.0 mL of 0.200 M nitric acid  moles of H+ is equal to 0.02 500.0 mL of 0.0100 M barium hydroxide  moles of OH- is equal to 0.01 200.0 mL of 0.100 M rubidium hydroxide  moles of OH- is equal to 0.02 When it asks you calculated the four moles of the solutions, this is what they are referring to.