Name Positive ion Negative ion Formula K+ Co32- K2CO3 Potassium carbonate Sodium nitrate NANO3 Calcium bicarbonate Ca(HCO3)2 Chromium(III) hydroxide Cr(OH)3 Lithium phosphate LIЗРО4 Potassium sulfate K2S04
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A: when calcium react with nitrogen it form Ca3N2
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Q: PART1: Write the name of each binary covalent compound. Formul Name Formula Name Formula Name SF6…
A: SF6 - Sulphur hexafluoride ClO2 - Chlorine dioxide IF7 - Iodine heptafluoride OF2 - Oxygen…
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Q: Name the following binary ionic compounds. (a) MgF, (b) Bal2 (c) FeCl2
A: The names of above binary ionic compounds are given in step 2
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A: Calcium ion is name of Ca+2 which is homogeneous alkaline earth metal
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- Mixing the chelating reagent B with Ni(II) forms the highly colored NiB22+, whose solutions obey Beer’s lawat 395 nm overa wide range. Provided the analytical concentration of the chelating reagent exceeds that of Ni(II) by a factor of 5 (or more), the cation exists, within the limits of observation, entirely in the form of the complex. Use the accompanying data to evaluate the formation constant Kf for the process Ni2++2BNiB22+4. determine the amount in mg of the amount of Ag present from ICP mass digested: 1.0821g/L dilution of 10ml stock solution to 100ml volumetric flask X=0.98 (intensity)The molar absorptivity for cobalt and nickel complexes with 2,3-quinoxalinedithiol are 3.64x104L/M-cm for Co at 510nm, 5.52x103L/M-cm and 1.24x103L/M-cm for Co at 656nm and 1.75x104L/M-cm for Ni. A 250mg soil sample that was collected near an industrial metal-processing plant is dissolved, and masking agent is added to avoid interference from other metals present. Color is developed by adding the complexing agent and the sample is diluted to 100.00ml. The absorbance at 510nm is 0.517 and at 656nm it is 0.405 in a 1.00cm cell. Calculate the weight percent of Co and Ni in the soil.
- The formation constant for the complexation of Mg2+ by EDTA is logKflogKf = 8.79. The conditional formation constant (Kf’) at pH 8 (αY4−αY4−= 4.2 x 10-3) is: 0.037 2.6 x 106 5.14 1.5 x 1011 6.40 The acid-base indicator HIn undergoes the following reaction in dilute aqueous solution:HIn color1 m H1 1 In2color2The following absorbance data were obtained for a 5.00 3 1024M solution of HIn in 0.1 M NaOH and0.1 M HCl. Measurements were made at wavelengths of 485 nm and 625 nm with 1.00-cm cells.0.1 M NaOH A485 5 0.075 A625 5 0.9040.1 M HCl A485 5 0.487 A625 5 0.181In the NaOH solution, essentially all of the indicator is present as In2; in the acidic solution, it is essentiallyall in the form of HIn.(a) Calculate molar absorptivities for In2 and HIn at 485 and 625 nm.(b) Calculate the acid dissociation constant for the indicator if a pH 5.00 buffer containing a small amountof the indicator exhibits an absorbance of 0.567 at 485 nm and 0.395 at 625 nm (1.00-cm cells).(c) What is the pH of a solution containing a small amount of the indicator that exhibits an absorbance of0.492 at 485 nm and 0.245 at 635 nm (1.00-cm cells)?(d) A 25.00-mL aliquot of a solution of purified weak…EDTA abstracts bismuth(III) from its thiourea complex:Bi1tu2631 1 H2Y22 S BiY2 1 6tu 1 2H1where tu is the thiourea molecule (NH2)2CS. Predict the shape of a photometric titration curve based on thisprocess, given that the Bi(III) or thiourea complex is the only species in the system that absorbs light at 465nm, the wavelength selected for the analysis.
- A calibration curve for the colorimetric determination of phosphorous in urine is prepared by reacting standard solutions of phosphate with molybdenum(VI) and reducing phosphomolybdic acid complex to produce the characteristic blue color. The absorbance (A) is plotted against the concentration of phosphorous. From the following data, determine the linear least-squares straight line and calculate the concentration of phosphorous in the urine sample. Phosphorous (ppm) 1.00 2.00 3.00 4.00 Unknown urine sample Fluorescence intensity 0.205 0.410 0.615 0.820 0.625An aqueous solution of sodium hexaiodoplatinate(IV) isblack. What conclusions can be drawn about the absorption spectrum of the [PtI6]2- complex ion?. A student collects the following data for the absorbance of a complex measured in 1.00 cmspectrophotometric cells. The molar absorptivity (ε) of the complex under investigation is 2.25×103L/mol·cm. Calculate the concentration of the complex in solution at each time of the reaction.Time (min)MeasuredAbsorbanceComplex Concentration(M)0.000 1.50010.000 1.31320.000 1.12530.000 0.93840.000 0.750
- The Racah parameter B for [Co(CN)6]3−=460cm−1, and [Co(NH3)6]3+= 615cm−1. Explain the difference in nephelauxetic effect. Thank you!Molar absorptivities of Nickel and Cobalt with 8-quinilinol are εCo = 3529 and εNi = 3228 at 365 nm, and εCo = 428.9 and εNi = 0 at 700 nm. calculate concentration of nickel and cobalt in solution that gave Abs=0.617 at 365nm and Abs=0.0235 at 700nm.kindly answer this problem and follow this format GIVEN REQUIRED SOLUTION and write regibly thank you so much For the adsorption of a substance A from aqueous solution by charcoal at25oC the freundlich constants are n=3.0 and k=0.50 for y in grams per gramand C in grams per liter. What weight of a W is adsorbed by 2 g of charcoalfrom 1 L of a solution containing originally 2 g of the substance?