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Question - Strong base is dissolved in 625 mL of 0.200 M weak acid (Ka = 3.18 x 10-5 M) to make a buffer with a pH of 4.13. Assume that the volume remains constant when the base is added. Calculate the pKa value of the acid and the number of moles of acid initially present.
I am not able to determine the correct answer for the above question please helps me to get the correct answer
Can someone please show me the product, and the reaction by-product of the following reaction? Please make sure that the reaction is balanced. And draw the structure please
14.312g of magnesium nitrate were dissolved in water to produce 650ml of solution. The formual concentration of he solution.
1. What are the shapes of the NMe4+, [I3]- and [I5]- ions? The hybridization of the atoms?
Define or give examples for the following terms using words and equations as necessary. If a symbol exists, write it along with metric units (kg, m, s, J, N, kJ, kPa, C, K, kmol, etc.)
But a3.00 g sample of Mg dissolves in nitric acid to give 18.3 g of magnesium nitrate, which gives 4.98 g of MgO when heated to 1000 degrees Celsius. These results illustrate which law, theory or hypothesis?
Calculate the pH of of a solution prepared by mixing 60.0 mL of 0.160 M HCl with 15.0 mL of water. How much antacid containing 400.0 mg of Mg(OH)2 in 5 mL of water is needed
The graph above shows the titration curves of four monoprotic acids of varying strengths. All of the acids start out at 0.1 M concentration and 25.0 mL volume. Choose all of the correct statements about these titration curves from the choices belo..
The equilibrium constant for the reaction of carbon and water to form carbon monoxide and hydrogen is .20 at 1000 degrees C. If an equilibrium mixture contains solid carbon, 0.40 M H2O and 0.40M CO, what is the concentration of H2
Explain what is the % (w/v) of solution. Define what volume (mL) of solution would contain 0.500 grams of glucose? Define how many grams of glucose would be present in 345mL of the solution
Find the pH at the equivalence point(s) and the volume (mL) of 0.125M HCL needed to reach the point(s) in titrations
Draw the skeletal structure for trans-1-bromo-2-isopropylcyclopentane. Make sure the tapered end, i.e. the thin end, of the wedge bond is attached to the parent.
What is the entropy change for the reaction 2H2(g) + O2(g) 2H2O(l) at 372.2 K and 1.0atm? the enthalpy of reaction at 298.2K and 1.0atm is -572 KJ. The Cp values for H2, O2 and H2O are respectively
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