A solution of 41.11 ml of 0.007307 M A¡B3 is mixed with a solution of 22.1 ml of 0.00200 M C¡D3. Find the value of pQ (the minus log of Q) for the formation of C B O 8.69 O 10.12 O 7.14 O 6.87
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- Consider the equation G = -nF. What are the four terms in this equation? Why does a minus sign appear in the equation? What does the superscript o indicate?Consider these compounds: A. BaF2 B. Ca(OH)2 C. AgI D. NiCO3 Complete the following statements by entering the letter(s) corresponding to the correct compound(s). (If more than one compound fits the description, include all the relevant compounds by writing your answer as a string of characters without punctuation, e.g, ABC.) Without doing any calculations it is possible to determine that manganese(II) carbonate is more soluble than ___ , and manganese(II) carbonate is less soluble than ___. It is not possible to determine whether manganese(II) carbonate is more or less soluble than ___ by simply comparing Ksp values. KSP: MnCO3: 1.8 × 10^-11 BaF2: 1.7 × 10^-6 Ca(OH)2: 7.9 × 10^-6 AgI: 1.5 × 10^-16 NiCO3: 6.6 × 10^-9A commercial product designed to prevent cut fruit from turning brown contains a mixture of ascorbic acid (HC6H7O6) and sugar (C12H22O11). Calculate the percent (w/w) of ascorbic acid in this product if a 2.1994 g portion of this product requires 36.15 mL of 0.2328 M NaOH to reach a phenolphthalein endpoint. MM HC6H7O6: 176.12 MM NaOH: 40.00
- The mass of K3PO4 needed to prepare 250.0mL of an aqueous solution in which PO4-3 concentration is 0.0550M. The answer is ……………………… How many grams of silver sample is equal to 0.0417 mole of silver The answer is ……………………… When 38.0 mL of 0.1250 M H2SO4 is added to 100 mL of a solution of PbI2, a precipitate of PbSO4 forms. The PbSO4 is then filtered from the solution, dried, and weighed. If the recovered PbSO4 is found to have a mass of 0.0471g, what was the concentration of iodide ions in the original solution The answer is ……………………………… Express 96.342 m using 2 significant figures The answer is ………………………………. The oxidation number of sulfur in (Na2S2O5) is? The answer is ………………………………The solubility of aqueous PbCr2O7 at 25 oC is 1.55 x 10–2 g/L at 25.0 oC. Calculate the Ksp of PbCr2O7 at this temperature. MM PbCr2O7 = 423.188 g/mol1) Consider the following substances:Lead (II) Carbonate, PbCO3 KSP = 7.40 x10-14Magnesium Carbonate, MgCO3 KSP = 6.82 x10-6Strontium Carbonate, SrCO3 KSP=5.60 x 10-10If 100.0 grams of each were added to 1.00 L of water at 25°C, put them in increasing order ofconcentration of carbonate ions, CO32-.
- In the standardization of HCl using pure anhydrous sodium carbonate as the primarystandard for methyl orange as an indicator, 1.0 mL HCl was found to be equivalent to 0.05gof sodium carbonate (MW =106). The normality of HCl is:2KMnO4 (aq) +5H2C2O4 (aq) + 3H2SO4 (aq) > 10CO2 (g) + K2SO4 (aq) +2MnSO4 (aq) + 8H2O (l) 90ml of 0.0150 M KMnO4 solution is mixed with 30 ml of 0.095 M H2C2O4 solution in a medium where there is excess sulfuric acid. Assume 100% yield Calculate the concentration of the following ions or molecules in the final solution a) Mn2+ b) K+ c) MnO4- d)H2C2O4مجموعة ٦ The solubility product (Ksp) for Pb(OH)2 (s) is 2.5 x 10-16. What would be the quantity of solubility by g/L of Pb(OH)2 which has Mwt = 241.2 g/mole)?
- The hardness of water (hardness count) is usually expressed in parts per million (by mass) of CaCO3. What is the molar concentration of Ca2+ ions in a water sample with a hardness count of 175mg CaCO3il? How many milliliters of concentrated sulfuric acid, 94.0% (w/w), specific gravity of 1.831 are required to prepare 1 liter of a 0.100 M solution? The solubility-product constant for Ce(IO3)3 is 3.2x1010. What is the Ce3+ concentration in a solution prepared by mixing 50.0 ml of 0.0250 M Ce3.. with 50.00 ml of water?1.1The Ksp of Ca3 (PO4 ) 2 is 1.3 × 10−26 . Estimate the solubility of this salt in units of g. L −1 . You must show any reaction equation(s) that you may think are necessary. 1.2 If a sample of solid Ca3(PO4)2 is stirred into exactly one litre of a 0.550M solution of Na3PO4, how will the solubility of the salt compare with the answer that you have obtained in question 1.1? Explain you answer in a short sentence.Determine the volume of glacial acetic acid to prepare 500 ml of a 0.020 M acetic acid solution (glacial acetic acid; strength 99.8%, density 1.05 g/ml, MW 60.05 g/mole).