how are Co2+ and Ni2+ ions separates from the other ions of this group? explain in...
kar 10-1 12. What sort of titration is the adjacent titration curve? Circle the correct response and explain your choice. SA/SB, SA/WB, SB/WA pH 13. Where is the effective buffer region in this titration curve? Circle this region on the graph. 4) Estimate the Ks of the weak base being titrated in this curve. . 10 20 30 13) Why does the pink color of phenolphthalein fade away? Was the equivalence point for the SA/SB system really where you expected...
You wish to use precipitation to separate Br− ion from I− ions in a solution that is 0.50 M in each. You find Ksp values for the copper(I) salts are 6.3 x 10−9 for CuBr and 1.3 x 10−12 for CuI at 25°C. If you are required to reduce the value of one ion to 0.10% of its original value for “complete separation,” will selective precipitation by Cu+ work? Show your calculations and justify your answer.
Many metal ions are precipitated from a solution by the sulfide ion. As an example, consider treating a solution of copper(II) sulfate with sodium sulfide solution: CuSO4(aq) + Na2S(aq) → CuS(s) + Na2SO4(aq) What volume of 0.104 M Na2S solution would be required to precipitate all of the copper(II) ion from 13.4 mL of 0.120 M CuSO4 solution? Volume = mL Submit Answer Try Another Version 7 item attempts remaining Generally, only the carbonates of the Group 1 elements and...
Question 22 of 30> The femur of a human leg (mass 10 kg, length 0.9 m) is in traction, as shown in the figure. The center of gravity of the leg is one-third of the distance from the pelvis to the bottom of the foot. Two objects, with masses mi and m2, are hung at the ends of the leg using pulleys to provide upward support. A third object of 8 kg is hung to provide tension along the leg....
Need to know how to work out problem in steps and the answer to each salt to check my work pls Calculate the molar solubility of salt in pure water. The Ksp value is -The instructors will choose a salt such as CaCO3, Pblz, Hg Clh, Ag PO4, or Ca(PO4)2. The instructors wil give a numerical value for Ksp appropriate to the salt. - Your full-credit answer must show (1) the balanced solubility equilibrium reaction equation, (2) the Ksp equilibrium...
Contrast euchromatin and heterochromatin. Then explain how DNA can transition from one to the other. Use the terms histone, nucleosome, and acetylation.
Number 12 Determine the coordination number for each ion: How many ions of each type are within one unit cell? Determine the face diagonal distance between the corner anions in the zine blend structure(figure B). Express this distance as a function of the cation and anion r_c and r_a that make up the crystal. Use this distance to determine the unit cell edge length, A, in terms of r_c and r_a. Given a Zn^2+ radius of 82 pm and aS^2-...
Note: Do not just list and define terms from your handouts!!! “Discuss" means describe how the terms or elements interrelate with each other. Show me you know not only the terms but also how to use them in discussing health care Question 1. (50 points) Why is there a current trend towards a Wellness Model" in the US? Use examples from readings to support your answer!!! Question 2. (50 points) Identify and discuss the various characteristics of healthcare services in...
The femur of a human leg (mass 10 kg, length 0.9 m) is in traction, as shown in the figure. The center of gravity of the leg is one-third of the distance from the pelvis to the bottonm of the foot. Two objects, with masses m and m2, are hung at the ends of the leg using pulleys to provide upward support A third object of 8 kg is hung to provide tension along the leg. The body provides tension...
Concentration of CO2 in the Atmosphere Levels of carbon dioxide (CO2) in the atmosphere are rising rapidly, far above any levels ever before recorded. Levels were around 278 parts per million in 1800, before the Industrial Age, and had never, in the hundreds of thousands of years before that, gone above 300 ppm. Levels are now nearing 400 ppm. Table 1 shows the rapid rise of CO2 concentrations over the last 50 years, also available in CarbonDioxide.1 We can use...