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Name 33 common elements and their predominant species in the environment (e.g., phosphorus (P) exists as oxidation state P5+ that occurs as the phosphate oxyanion (PO43-) with three different protonation states).
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- Consider these compounds: A. Al(OH)3 B. Ag3PO4 C. Zn3(PO4)2 D. Ca3(PO4)2 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 barium phosphate is more soluble than , and barium phosphate is less soluble than . It is not possible to determine whether barium phosphate is more or less soluble than by simply comparing Ksp values.. Perchloric acid (HClO4, MW = 100.458) is commercially available as a72.5% solution with a density of 1.67 g/cm3. Calculate the both themolal concentration of HClO4 in this solution.As a chemist, you are tasked to submit a written report about the key solutes dissovled in the sea, the concentration of these solutes at varying deoths and the beneficial and harmful effects of these substances to both plants and animals in the sea.
- (a) Write chemical equations to show what happens when each of the following substances is mixedwith water:(i) Hydride ion(ii) Glucose, C6H12O6(s)(iii) Copper(II) bromide(iv) Formic acid(b) Write chemical equations for the following processes:(i) Chemical reaction for ΔH°f for mercury(I) phosphate.(ii) Thermal dissociation of gaseous bromine.(iii) Sublimation of carbon dioxide.(iv) Reduction of VO2+ to produce VO2+.(v) Neutralization of sulfuric acid by barium hydroxide.(vi) Thermal decomposition of 1 mol of sodium bicarbonate to produce sodium carbonate, carbon dioxide and waterA 10.0 mL sample of household ammonia solution required 25.10 mL of 0.245 M HNO3 for neutralization. Calculate (a) the molar concentration of the ammonia and (b) the mass/mass % concentration of ammonia(17.04 d/mol), given a solution density of 0.985 f/mL. HNO3(aq) +NH3(aq) ---> NH4NO3(aq)1) Why must the exact same mass of solution (100.0 g) be used in the neutralization reactions? 2) 50.0 g of water at 22 °C is mixed with 125 g of water initially at 36 °C. What is the final temperature of the water after mixing, assuming no heat is lost to the surroundings?
- What is the molarity of 1 kg of KNO3 (MW=101.11g) dissolved in 2.75 L of solution?11.A sample of 10 g of potassium iodide is dissolved in a beaker. Then it is poured in a volumetric flask of 500 mL and water is added up to the gauging. In relation to this information it is true to state that: I. The final volume of this solution is 0.500L.II. The technique used for the preparation of solutions is dilution.III. The molarity of the solution formed is 0.12 mol/L. A) I B)I and III C)I and II D) II and III(a) Write chemical equations to show what happens when each of the following substances is mixed with water: (1) Hydride ion (ii) Glucose, C6H12O6(s) (iii) Copper(II) bromide (iv) Formic acid (b) Write chemical equations for the following processes: 1. Chemical reaction for ΔHf for mercury(I) phosphate 2. Thermal dissociation of gaseous bromine 3. Sublimation of carbon dioxide 4. Reduction of VO2+ to produce VO2+ 5. Neutralization of sulfuric acid by barium hydroxide 6. Themal decomposition of I mol of sodium bicarbonate to produce soditum carbonate, carbon dioxide and water
- a student prepares sodium acetate by allowing 2.44ml of glacial acetic acid (17.4M) TO REACT W/ 2.5 Grams of solid NaOH. Calculate the theoretical yield in grams of sodium acetate.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:Given: 0.35g NaCl, 0.25 g NaHCO3, 0.15 g KCl & 2 g C6H12O6 are present in 100 mL ORS solution (MW: Na: 23, K: 39, Cl: 35, H: 1, C: 12, O: 16) a. Calculate the total amount of glucose expressed in mmol/L present in the prepared solution b. Calculate the total amount of sodium expressed in mmol/L present in the prepared solutionc. c. Calculate the total amount of potassium expressed in mmol/L present in the prepared solution a 111.11 mmol/L b 90.10 mmol/L c 80.61 mmol/L d 60.34 mmol/L e 29.76 mmol/L f 20.27 mmol/L