Some precipitate is lost when the filter paper and the precipitate is removed from the drying...
Some precipitate is lost when the filter paper and the precipitate is removed from the drying oven. The filter paper and precipitate is subsequently weighed. Would the calculated percent by mass of the unknown ion in the compound be higher or lower than the True Value? Justify your answer with an explanation.
Homework Answers
calculated percent by mass of the unknown ion in the compound will be lower than the True Value.
Since, some of the compound will sticked to the filter paper (complete recovery is not possible after drying) and during drying process some compound may undergo combustion due to the uneven oven temperatures (probably high temperatures).
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Some precipitate is lost when the filter paper and the
precipitate is removed from the drying...
Be specific when answering the questions, Do NOT state that "it will be affected” or that...
Be specific when answering the questions, Do NOT state that "it will be affected” or that “it will be higher OR lower" 1. A couple of drops of water were accidentally placed on the folded filter paper and the mass was obtained before filtration. However, after air-drying for a week, the filter paper and precipitate were dry and the mass was obtained. As a result of this sloppy technique, how will the calculated mass of the limiting reactant be affected?...
Mass of 150ml, beaker: Mass of beaker, filter paper, and 30.10 copper (11) phosphate after drying:...
Mass of 150ml, beaker: Mass of beaker, filter paper, and 30.10 copper (11) phosphate after drying: Mass of copper (ll) phosphate produced: (actual yield) Percent yield of copper (11) phosphate: B. DETERMINATION OF THE COMPOSITION OF A MIXTURE OF SO- DIUM PHOSPHATE AND SODIUM CHLORIDE 3.28 of o Mass of mixture: Balanced chemical equation: 2NA PO + 3aul -> Cua (P)+6 Nace 61.52 32 220.65% Mass of CuCl, necessary: (show calculation) 329. Nas fou wel Nesply 13 mol Cucts 120.489...
29 NEUTRALİZATION CALORIMETRY 3-THERMODYNAMICS: ENTHALPY OF EXERCISES 1. If the final te or eratu...
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Lab procedure: This laboratory exercise involves the use of dilute sulfuric acid (H2SO4) to leach...
Lab procedure: This laboratory exercise involves the use of dilute sulfuric acid (H2SO4) to leach copper from a synthetic copper-containing ore, malachite. This technique is known in the mining industry as solution mining. The soluble copper is then filtered to remove unreacted ore (the residue) from the filtrate containing the copper+2 ion. The copper in the filtrate is then treated with metallic magnesium to precipitate the copper as the familiar orange-brown metal. This copper is dried and weighed. From these...
#5 Write the solubility product expression for PbCl2. Using the concentration for the Pb+2 and Cl-...
#5 Write the solubility product expression for PbCl2.
Using the concentration for the Pb+2 and Cl- ions, solve for your
experimental Ksp.
#6 Using your book, find the theoretical Ksp for PbCl2
to determine your percent error
A Solubility Product Constant Introduction: Many substances are very soluble in water. However, in this experiment you will be concerned with substances that are insoluble or only slightly soluble. Dynamic equilibrium is established when an excess of a slightly soluble substance is placed...
U The compound solute) wils nol dissolved cop y When Soluto was not completely dissolved mass...
U The compound solute) wils nol dissolved cop y When Soluto was not completely dissolved mass Of SOUTC novic be tricen i ess but we are using mass of solute as higirur Vore so the calculated moacviar mass would be more than the true valve Of Molecular MASS. c) A foreign solute was already present in the solvent When a farcign Joure is preprost Arcady presento mass of Solute Should be thon more than Wb, with the uſe of w...
How do you calculate questions 1 - 8 for the data analysis section? A. Precipitation of CaC,O, H,O from the Salt...
How do you calculate questions 1 - 8 for the data analysis
section?
A. Precipitation of CaC,O, H,O from the Salt Mixture Unknown number Trial 1 Trial 2 1. Mass of beaker (g) 59.45 59.45 5.oS Mass of beaker and salt mixture (g) 2. 3. Mass of salt mixture (g) I, oo oS 4. Mass of filter paper (g 5. Mass of filter paper and product after air-dried or oven-dried (g) 0, 35 6. Mass of dried product (g) 7....
2. Define the following: a. acid-base reaction b. displacement reaction c. oxidation-reduction reaction d. weak electrolyte...
2. Define the following: a. acid-base reaction b. displacement reaction c. oxidation-reduction reaction d. weak electrolyte 115 A Sequence of Chemical Reactions 3. PPPPPPPPPP Identify the following equations as single or double displacement, redox, acid-base, combination, or decompostion reactions. Some may fit in more than one category. a. Cu(s) + 4HNO, (aq) → Cu(NO),(aq) + 2NO, + 2H,0 Mg(s) + H.SO(aq) - MgSo. (aq) + H (6) CuO(s) + HCl(aq) → Cuci (aq) + H,000 d. Cu(NO),(aq) + 2NaOH(aq ->...
Hi, Can anyone make sure Questions 4,5,6, and 7 are correct? Also, if there is a...
Hi,
Can anyone make sure Questions 4,5,6, and 7 are correct?
Also, if there is a mistake, then write down the answers
please
1. If 0.765g of an unknown gas is collected at 741 torr (corrected) and 95°C in a 245 ml container, calculate the molecular weight of this unknown gas? P=741 tona PV=ART -> ideal gas equation n=PU T=95C+243=368K BT mass of the gas = 0.7659 =a41tów 80.245€ R= 62-4L-fowl mol- 624kbar V=245 med 'x 36644 Moler mass of...
Can, anyone make sure these answers are correct? 1. If 0.765g of an unknown gas is...
Can, anyone make sure these answers are correct?
1. If 0.765g of an unknown gas is collected at 741 torr (corrected) and 95°C in a 245 ml container, calculate the molecular weight of this unknown gas? P=741 tona PV=ART -> ideal gas equation n=PU T=95C+243=368K BT mass of the gas = 0.7659 =a41tów 80.245€ R= 62-4L-fowl mol- 624kbar V=245 med 'x 36644 Moler mass of the gos= 0.7659 245L 6 +91-1 60079rmal 2. If in the experiment in Question 1,...
Be specific when answering the questions, Do NOT state that "it will be affected” or that “it will be higher OR lower" 1. A couple of drops of water were accidentally placed on the folded filter paper and the mass was obtained before filtration. However, after air-drying for a week, the filter paper and precipitate were dry and the mass was obtained. As a result of this sloppy technique, how will the calculated mass of the limiting reactant be affected?...
Mass of 150ml, beaker: Mass of beaker, filter paper, and 30.10 copper (11) phosphate after drying: Mass of copper (ll) phosphate produced: (actual yield) Percent yield of copper (11) phosphate: B. DETERMINATION OF THE COMPOSITION OF A MIXTURE OF SO- DIUM PHOSPHATE AND SODIUM CHLORIDE 3.28 of o Mass of mixture: Balanced chemical equation: 2NA PO + 3aul -> Cua (P)+6 Nace 61.52 32 220.65% Mass of CuCl, necessary: (show calculation) 329. Nas fou wel Nesply 13 mol Cucts 120.489...
29 NEUTRALİZATION CALORIMETRY 3-THERMODYNAMICS: ENTHALPY OF EXERCISES 1. If the final te or erature taken in part I was higher than the true value, the calculated value for the heat capacity of the lower than the true value? calorimeter be higher than in the process of transferring the metal cylinder from the hot water to the in part II, the cylinder lost some heat, would the calculated value 2. If for the specific heat of the metal be higher or...
#5 Write the solubility product expression for PbCl2.
Using the concentration for the Pb+2 and Cl- ions, solve for your
experimental Ksp.
#6 Using your book, find the theoretical Ksp for PbCl2
to determine your percent error
A Solubility Product Constant Introduction: Many substances are very soluble in water. However, in this experiment you will be concerned with substances that are insoluble or only slightly soluble. Dynamic equilibrium is established when an excess of a slightly soluble substance is placed...
U The compound solute) wils nol dissolved cop y When Soluto was not completely dissolved mass Of SOUTC novic be tricen i ess but we are using mass of solute as higirur Vore so the calculated moacviar mass would be more than the true valve Of Molecular MASS. c) A foreign solute was already present in the solvent When a farcign Joure is preprost Arcady presento mass of Solute Should be thon more than Wb, with the uſe of w...
How do you calculate questions 1 - 8 for the data analysis
section?
A. Precipitation of CaC,O, H,O from the Salt Mixture Unknown number Trial 1 Trial 2 1. Mass of beaker (g) 59.45 59.45 5.oS Mass of beaker and salt mixture (g) 2. 3. Mass of salt mixture (g) I, oo oS 4. Mass of filter paper (g 5. Mass of filter paper and product after air-dried or oven-dried (g) 0, 35 6. Mass of dried product (g) 7....
2. Define the following: a. acid-base reaction b. displacement reaction c. oxidation-reduction reaction d. weak electrolyte 115 A Sequence of Chemical Reactions 3. PPPPPPPPPP Identify the following equations as single or double displacement, redox, acid-base, combination, or decompostion reactions. Some may fit in more than one category. a. Cu(s) + 4HNO, (aq) → Cu(NO),(aq) + 2NO, + 2H,0 Mg(s) + H.SO(aq) - MgSo. (aq) + H (6) CuO(s) + HCl(aq) → Cuci (aq) + H,000 d. Cu(NO),(aq) + 2NaOH(aq ->...
Hi,
Can anyone make sure Questions 4,5,6, and 7 are correct?
Also, if there is a mistake, then write down the answers
please
1. If 0.765g of an unknown gas is collected at 741 torr (corrected) and 95°C in a 245 ml container, calculate the molecular weight of this unknown gas? P=741 tona PV=ART -> ideal gas equation n=PU T=95C+243=368K BT mass of the gas = 0.7659 =a41tów 80.245€ R= 62-4L-fowl mol- 624kbar V=245 med 'x 36644 Moler mass of...
Can, anyone make sure these answers are correct?
1. If 0.765g of an unknown gas is collected at 741 torr (corrected) and 95°C in a 245 ml container, calculate the molecular weight of this unknown gas? P=741 tona PV=ART -> ideal gas equation n=PU T=95C+243=368K BT mass of the gas = 0.7659 =a41tów 80.245€ R= 62-4L-fowl mol- 624kbar V=245 med 'x 36644 Moler mass of the gos= 0.7659 245L 6 +91-1 60079rmal 2. If in the experiment in Question 1,...
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