A solution is prepared from an unknown solid containing Ni and Cu by dissolving 5.2832 grams of the solid in nitric acid to release Ni2* and CuR*. The nitric acid is neutralized and the solution diluted to 200.0 mL. Next excess sodium carbonate is added to the solution to form Ni and Cu carbonates with a total mass of 2.5305 grams. The precipitate is then ignited to form NiO and CuO with a total mass of 1.6126 grams.

Q: A 21.25g mixture of the solid salts, sodium chloride and lead (11) nitrate , is added to distilled…

A:

Q: 25 mL of a bleach (NAOCI) sample is diluted to 500 mL. An excessive amount of KI is added to the 20…

A: The question is based on the concept of complexometric titrations.   we have to calculate percentage…

Q: A 155.0 mL solution of 2.661 M strontium nitrate is mixed with 215.0 mL of a 2.464 M sodium fluoride…

A:

Q: MGNH&PO4-6H2O has a solubility in water of 0.023 g/100mL. Suppose a student obtains 0.7193 g of…

A: Solution:- Given the solubility of MgNH4PO4.6H2O is 0.023 g/100 mL  Mass of precipitate = 0.7193 g…

Q: A dietary iron supplement consist of tablets containing the metal in the form of ferrous ions…

A: The balanced reaction taking place is given as, => 2 KMnO4 + 8 H2SO4 + 10 FeSO4 -------> K2SO4…

Q: A 150.0 mL solution of 3.011 M strontium nitrate is mixed with 210.0 mL of a 3.176 M sodium fluoride…

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Q: A sample of an unknown sulate has a mass of 0.200g. The addition of excess barium chloride solution…

A: The number of moles for the given solution can be calculated as follows: n=mM where n: number of…

Q: The Burke Museum at the UW is analyzing a dinosaur bone sample for the amount of calcium it…

A: The solid

Q: It is desired to neutralize a solution X that contains a mixture of potassium chloride and…

A: The solution contains several steps.Explanation:Step 1:Step 2: Step 3: Step 4:

Q: A 185.0 mL sample of 1.200 M Pb(NO₃)₂ is mixed with 99.50 mL of 1.500 M NaCl, and the PbCl₂…

A: The balanced chemical equation for the precipitation of lead (II) chloride can be written as:…

Q: A sample of 5.11 g5.11 g of solid calcium hydroxide is added to 32.0 mL32.0 mL of 0.500 M0.500 M…

A: HCl        +        Ca(OH)2      →        CaCl2              +          H2O    on reactant side…

Q: A solution of 300.0 mL of 0.150 M Nickel (II) sulfate is mixed with a solution of 100.0 mL of 0.200…

A: Balanced chemical equation is necessary so as to abide by the law of conservation of mass and to…

Q: A student wishes to determine  the mass percentage of barium in a 2.016g  sample. The student…

A: Given : Molarity of H2SO4 = 0.20M Volume of H2SO4 = 20mL

Q: Solid ammonium chromate is slowly added to 175 mL of a 0.397 M calcium nitrite solution until the…

A: Given: Concentration of CrO42- = 0.0543 M Concentration of calcium nitrite = 0.397 M Volume of…

Q: A solution of NaCl(aq) is added slowly to a solution of lead nitrate, Pb(NO,),(aq), until no further…

A: Reaction taking place:  2NaCl  +  Pb(NO3)2  →  2NaNO3  +  PbCl2 In general 2 moles of NaCl reacts…

Q: A solution of NaCl(aq) is added slowly to a solution of lead nitrate, Pb(NO,),(aq), until no further…

A: Explanation: Calculation of the moles of PbCl_2PbCl2 as:- Mass = 14.20 g Molar mass of…

Q: When 45.0 mL of a 1.0 M lead (ii) nitrate solution react with 45.0 mL of a 1.0 M sodium iodide…

A:

Q: A 185.0 mL sample of 1.200 M Pb(NO₃)₂ is mixed with 119.50 mL of 1.500 M NaCl, and the PbCl₂…

A: The balanced Chemical Reaction for less Nitrate and sodium chloride is - Pb(NO₃)₂  + 2NaCl ---->…

Q: A 0.764-g sample containing barium ions is completely dissolve in water and treated with excess…

A: The question is based on the concept of quantitative analysis. we need to calculate percentage…

Q: Zinc and magnesium react with hydrochloric acid to produce the metal chlorides and hydrogen gas. A…

A: Mole is the amount of the substance that contains the same number of particles or atoms or…

Q: 185 mL sample of 1.20 M Pb(NO₃)₂ is mixed with 61.5 mL of 1.50 M NaCl, and the PbCl₂ precipitate is…

A: Lead nitrate reacts with sodium chloride to form lead chloride and sodium nitrate. Write the…

Q: A solution of NaCl(aq) is added slowly to a solution of lead nitrate, Pb(NO,),(aq), until no further…

A: Given mass of lead (II) chloride =12.18 g Molar mass of lead (II) chloride = 278.1 g/mol Number of…

Q: A solution of NaCl(aq) is added slowly to a solution of lead nitrate, Pb(NO,),(aq), until no further…

A:

Q: H2. Titrations are performed by a scientist in the laboratory as follows: a solution of deuterated…

A: A laboratory technique where the concentration of an unknown solution is determined using the volume…

Q: A 185.0 mL sample of 1.200 M Pb(NO3)2 is mixed with 99.50 mL of 1.500 M NaCl and the PbCl2…

A: Concentration of Pb(NO3)2 = 1.200 MVolume of sample of Pb(NO3)2 = 185 mLConcentration of NaCl =…

Q: A student weighs 0.583 g Baclz-2H20 and 0.637 g CuSO:-5H20, and dissolves each in water to a final…

A: Given A reaction between BaCl2.2H2O and CuSO4.5H2O, whose theoretical yield is to be determined.

Q: Complete the table below by deciding whether a precipitate forms when aqueous solutions A and B are…

A: A precipitate is an insoluble solid that may be formed in a chemical reaction when solutions…

Q: 255 mL of a 0.180 M aqueous solution of silver (I) nitrate is mixed with 145 mL of a 0.120 M aqueous…

A: Balanced equation: 3AgNO3 (aq) + Na3(PO4)(aq) = Ag3(PO4) (s) + 3NaNO3 Number of mmols = Molarity x…

Q: concentrated

A: Dear student I have given answer to your question in the image format.

Q: Solid potassium phosphate is slowly added to 150 mL of a 0.135 M aluminum chloride solution until…

A: Interpretation- Mass of aluminium in solution. Concept information- Solubility product (Ksp)- It is…

Q: 0.5366 g of an KHP sample of unknown purity was massed. The sample was dissolved in approximately…

A: The reaction between NaOH and KHP can be shown as,

Q: 29.5 mL of 2.50 M stock solution of sucrose is diluted to 50.0 mL. A 12.3 mL sample of the resulting…

A: We know that  Molarity of solution= mol of solute/ vol. of solution (L)  mole of sucrose = Molarity…

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".