A sample of ore containing manganese weighed 1.2354 grams. This sample was heated in a solution...
A sample of ore containing manganese weighed 1.2354 grams. This sample was heated in a solution of nitric acid, which dissolved the manganese ion producing manganese(III) nitrate [Mn(NO3)3]. The acidity of the solution was adjusted, and hydrogen sulfide gas was bubbled into the solution producing 0.2876 grams of manganese(III) sulfide [Mn2S3]. What is the percentage of manganese in the original sample?
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A sample of ore containing manganese weighed 1.2354 grams. This
sample was heated in a solution...
If a solution containing 30.61 g of lead(II) nitrate is allowed to react completely with a...
If a solution containing 30.61 g of lead(II) nitrate is allowed to react completely with a solution containing 5.102 g of sodium sulfide, how many grams of solid precipitate will be formed? mass of solid precipitate: How many grams of the reactant in excess will remain after the reaction? mass of excess reactant: Assuming complete precipitation, how many moles of each ion remain in solution? If an ion is no longer in solution, enter a zero (O) for the number...
18) When an aqueous solution of manganese (ll) nitrate is combined with an aqueous solution of...
18) When an aqueous solution of manganese (ll) nitrate is combined with an aqueous solution of ammonium sulfide, what should precipitate out? A) Mns B) Mn(SO3)2 C) Mn(SO4)2 D) Mn 2503 E) Mn 2504 19) If 4.89 g of ZnCl2 is dissolved in enough water to give a total volume of 500 ml, what is the molarity of the solution? A) 0.217M B) 0.0179 M C) 0.0717 M D) 1.33 M E) 0.849 M 20) What element is undergoing oxidation...
A student was given a solid containing a mixture of nitrate salts. The sample completely dissolved...
A student was given a solid containing a mixture of nitrate salts. The sample completely dissolved in water, and upon addition of dilute HCI, no precipitate formed. The pH was lowered to about 1 and HS was bubbled through the solution. No precipitate formed. The pH was adjusted to 8 and HS was again bubbled in. This time, a precipitate formed, Which compounds might have been present in the unknown? Zn(NO), Fe(NO), Ca(NO), AgNO, Sn(NO) NaNO, Bi(NO), CH(NO), Which salts...
A sample of copper ore with a mass of 0.4225 g was dissolved in acid. A...
A sample of copper ore with a mass of 0.4225 g was dissolved in acid. A solution of potassium iodide was added, which caused the reaction: 2Cu2+(aq) + 5I– (aq) → I3–(aq ) + 2CuI(s) The I3– that formed reacted quantitatively with exactly 29.96 mL of 0.02100 M Na2S2O3 according to the following equation: I3– (aq) + 2S2O32– (aq) → 3I– (aq ) + S4O62–(aq ) What was the percentage by mass of copper in the ore? If the ore...
Write and balance the following equations: Solid Potassium is added an to aqueous fluorine solution to...
Write and balance the following equations: Solid Potassium is added an to aqueous fluorine solution to produce aqueous potassium fluoride (5) Solid Aluminum is mixed with molten sulfur and allowed to cool producing a solid aluminum sulfide paste. AL Sulfur trioxide gas is heated producing a sulfur gas mixed with atmospheric elemental oxygen. Magnesium hydride solid is heated giving off hydrogen gas an leaving behind elemental magnesium metal. Elemental iron is added to an aqueous solution of chloric acid which...
A sample of aluminum metal is placed in a graduated cylinder. It is noted that 5.50...
A sample of aluminum metal is placed in a graduated cylinder. It is noted that 5.50 mL of water is displaced by the aluminum. The aluminum is then reacted with excess nitric acid to produce aluminum nitrate and hydrogen gas. Given the density for aluminum is 2.702 g/mL, how many grams of aluminum nitrate are produced in the reaction? 2Al(s) + 6HNO3(aq) + 2Al(NO3)3(aq) + 3H2(g)
help!! need tk balance the metals nickel(II), iron(III), manganese(II), and aluminum!! due in 20 minutes 4....
help!! need tk balance the metals nickel(II), iron(III),
manganese(II), and aluminum!! due in 20 minutes
4. Add 12 drops of water and 2 drops of 12 M hydrochloric acid and stir thoroughly for about a minute. Centrifuge and decant the solution immediately. Save the solution for Step 6. 5. Wash the precipitate from Step 4 with water and discard the washing. Add 5 drops of 6 M hydrochloric acid and 1 drop of 6M nitric acid. Heat in a water...
QUESTIONS: Expt. 21 Name: Silver nitrate is added to solution containing an unknown salt. An off-white...
QUESTIONS: Expt. 21 Name: Silver nitrate is added to solution containing an unknown salt. An off-white colored precipitate Torms Nitric acid is added to the mixture the precipitate dissolves and gas is given off Analyze this data and determine the anion present a CH b. Br d POS- e. CO 2 A dark glass bottle of chemicals is found in cleaning out an old basement Part of the label has been eaten away with age. Only the last part of...
PRE-LAB (5): EXPERIMENT #7, Redox and Spectrophotometric Determina 7, Redox and Spectrophotometric Determination of Manganese in...
PRE-LAB (5): EXPERIMENT #7, Redox and Spectrophotometric Determina 7, Redox and Spectrophotometric Determination of Manganese in order to analyze for manganese by photometry, Mn? in the sample is converted to deep purple MnO.. What reagent is used to bring about this oxidation 4420 2. (1) Write and balance the redox reaction for the oxidation of Mn(II) to Mn(VII). How many electrons are involved? 3. (1/2) Sometimes you get a brown precipitate during the oxidation step in this experiment. What is...
(5 marks) A solution containing chloride ion was analyzed by the mL sample containing chloride ion...
(5 marks) A solution containing chloride ion was analyzed by the mL sample containing chloride ion was treated with 25.00 mL of 0.2500 M silver nitrate. The precipitated AgCl was removed from the solution by filtration, and 1.00 mL of 0.1000 M Fe3 was added to the filtrate in order to titrate excess Ag with SCN. A volume of 10.67 mL of 0.2380 M KSCN was required for solution to turn red colour. What is the concentration of chloride ion...
If a solution containing 30.61 g of lead(II) nitrate is allowed to react completely with a solution containing 5.102 g of sodium sulfide, how many grams of solid precipitate will be formed? mass of solid precipitate: How many grams of the reactant in excess will remain after the reaction? mass of excess reactant: Assuming complete precipitation, how many moles of each ion remain in solution? If an ion is no longer in solution, enter a zero (O) for the number...
18) When an aqueous solution of manganese (ll) nitrate is combined with an aqueous solution of ammonium sulfide, what should precipitate out? A) Mns B) Mn(SO3)2 C) Mn(SO4)2 D) Mn 2503 E) Mn 2504 19) If 4.89 g of ZnCl2 is dissolved in enough water to give a total volume of 500 ml, what is the molarity of the solution? A) 0.217M B) 0.0179 M C) 0.0717 M D) 1.33 M E) 0.849 M 20) What element is undergoing oxidation...
A student was given a solid containing a mixture of nitrate salts. The sample completely dissolved in water, and upon addition of dilute HCI, no precipitate formed. The pH was lowered to about 1 and HS was bubbled through the solution. No precipitate formed. The pH was adjusted to 8 and HS was again bubbled in. This time, a precipitate formed, Which compounds might have been present in the unknown? Zn(NO), Fe(NO), Ca(NO), AgNO, Sn(NO) NaNO, Bi(NO), CH(NO), Which salts...
Write and balance the following equations: Solid Potassium is added an to aqueous fluorine solution to produce aqueous potassium fluoride (5) Solid Aluminum is mixed with molten sulfur and allowed to cool producing a solid aluminum sulfide paste. AL Sulfur trioxide gas is heated producing a sulfur gas mixed with atmospheric elemental oxygen. Magnesium hydride solid is heated giving off hydrogen gas an leaving behind elemental magnesium metal. Elemental iron is added to an aqueous solution of chloric acid which...
A sample of aluminum metal is placed in a graduated cylinder. It is noted that 5.50 mL of water is displaced by the aluminum. The aluminum is then reacted with excess nitric acid to produce aluminum nitrate and hydrogen gas. Given the density for aluminum is 2.702 g/mL, how many grams of aluminum nitrate are produced in the reaction? 2Al(s) + 6HNO3(aq) + 2Al(NO3)3(aq) + 3H2(g)
help!! need tk balance the metals nickel(II), iron(III),
manganese(II), and aluminum!! due in 20 minutes
4. Add 12 drops of water and 2 drops of 12 M hydrochloric acid and stir thoroughly for about a minute. Centrifuge and decant the solution immediately. Save the solution for Step 6. 5. Wash the precipitate from Step 4 with water and discard the washing. Add 5 drops of 6 M hydrochloric acid and 1 drop of 6M nitric acid. Heat in a water...
QUESTIONS: Expt. 21 Name: Silver nitrate is added to solution containing an unknown salt. An off-white colored precipitate Torms Nitric acid is added to the mixture the precipitate dissolves and gas is given off Analyze this data and determine the anion present a CH b. Br d POS- e. CO 2 A dark glass bottle of chemicals is found in cleaning out an old basement Part of the label has been eaten away with age. Only the last part of...
PRE-LAB (5): EXPERIMENT #7, Redox and Spectrophotometric Determina 7, Redox and Spectrophotometric Determination of Manganese in order to analyze for manganese by photometry, Mn? in the sample is converted to deep purple MnO.. What reagent is used to bring about this oxidation 4420 2. (1) Write and balance the redox reaction for the oxidation of Mn(II) to Mn(VII). How many electrons are involved? 3. (1/2) Sometimes you get a brown precipitate during the oxidation step in this experiment. What is...
(5 marks) A solution containing chloride ion was analyzed by the mL sample containing chloride ion was treated with 25.00 mL of 0.2500 M silver nitrate. The precipitated AgCl was removed from the solution by filtration, and 1.00 mL of 0.1000 M Fe3 was added to the filtrate in order to titrate excess Ag with SCN. A volume of 10.67 mL of 0.2380 M KSCN was required for solution to turn red colour. What is the concentration of chloride ion...
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