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Consider the dissolution of MnS in water (Ksp = 3.0 × 10-14).
MnS(s) + H2O(l) Mn2+(aq) + HS-(aq) + OH-(aq)
How is the solubility of manganese(II) sulfide affected by the addition of aqueous potassium hydroxide to the system?
Answer
A. The solubility will decrease.B. The solubility will increase.C. The pKa of H2S is needed before a reliable prediction can be made.D. The amount of KOH added must be known before its effect can be predicted.E. The solubility will be unchanged.
a 7.95 L Container holds a mixture of two gases at 37 degrees celcius. the partial pressure of gas A and gas B, respectively, are .287 atm and .698 atm. if .210 mol a third gas is added with no change in volume or temperature.
What are the possible values of the angular momentum quantum number l A.)represented by the formula: l = 2k + 1, where k is a positive integer B
A 787 mL gas sample at STP is compressed to a volume of 226 mL, and the temperature is increased to 29?C. What is the new pressure of the gas in Pa.
For a zero order chemical reaction, the A. half life period is directly proportion to the initial concentration of the reac-tants. B. plot of products concentration with time is a straight line through the origin
A sample of 1.0 mole of a perfect gas with cp= 20.8 J K-1 is initially at 3.25 atm and 310K. If it undergoes reversible adiabatic expansion until its pressure reaches 2.50 atm. Calculate the final volume and temperature and the work done.
Draw the Lewis structure for NOF. Nitrogen is the central atom. Include all lone pairs of electrons.
students performed acid-base titrations. Redox reactions can also be used in titrations. An example is the titration of ascorbic acid (H2C6H6O6) in lemon juice using triiodide (I3-). A starch indicator will turn the solution blue-black at the endp..
Proteins are biopolymers formed via multiple condensation coupling of which two functional groups
Describe the paradox and explain how modern genetic discoveries have helped resolve this paradox. In your explanation, be sure to include a real biological (genetic) mechanism, summarize how the mechanism works and why it (partially) resolves this..
How many moles of solute are present in each of the following solutions. (a) 145mL of 0.25M NaHCO3 (b) 631.0mL of 2.25M H2SO4
A buffer solution is 0.100 M in both HC7H5O2 and LiC7H5O2 and has a pH of 4.19. Which of the following pH values would you expect from the addition of a small amount of a dilute solution of a strong base?
You created a buffer system by first neutralizing the supernatant solution containing Pb2+, Fe3+, Al3+, Ca2+, Cu2+, and K+ ions with 6M NH3 solution , and then adding an equal additional volume of 6M NH3 solution. Explain what forms of NH3 were pr..
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