If performing a gravimetric sulfate experiment and you use ordinary filter paper instead of ashless filter paper, would results be too high or too low? If I'm trying to calculate percentage of sulfate in a sample and I used ordinary

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  1. Science

    1. Which of the following is true about mixtures? (1 point) Mixtures consist of two or more substances chemically combined. Mixtures cannot be separated by physical means. Mixtures consist of only one kind of atom. ***Mixtures have two or more substances

  2. Chemistry

    In this investigation, you will study the reaction between lead(II) nitrate, Pb(NO3)2, and potassium iodide, KI, to determine the percentage yield of lead(II) iodide. This reaction occurs based on the following equation: This image shows Pb(NO sub 3 ) sub

  3. Physics

    A fish tank has dimensions 46 cm wide by 1.0 m long by 0.70 m high. If the filter should process all the water in the tank once every 3.0 h, what should the flow speed be in the 3.0-cm-diameter input tube for the filter? I tried using Q=v/t and Q=vA...

  4. Physics

    A beam of partially polarized light can be considered to be a mixture of polarized and unpolarized light. Suppose a beam of partially polarized light is sent through a polarizing filter. The polarization direction of the filter can be changed by rotating

  5. chemistry

    was hoping someone can help me check if these answers make sense for a silver copper alloy lab. 3. Why don’t you have to weigh the sodium chloride on a sensitive balance? This one I am not sure about, It is because an excess of NaCl is needed to make

  6. Technology

    Which of the following is true about filters in Microsoft® Excel databases? A. Filters sort information in alphabetical order. B. Filters create fields that describe the remaining data. C. Filters make it easier to find specific information in a large

  7. Chemistry

    A student was tasked to perform gravimetric analysis of a soluble sulfate. His unknown sample weighed 0.7543 g. The sample underwent precipitation using BaCl2 and was digested for overnight. The precipitate was then filtered off to obtain white crystalline

  8. Chemistry

    A student observed the following reaction: AlCl3(aq)+3NaOH(aq) -> Al(OH)3(s)+3NaCl(aq) After the products were filtered, which substances remained on the filter paper and why?

  9. science

    How would you separate a mixture of small beads, sand, iron filings, salt, and water, using a magnet, filter funnel, filter paper, bunsen burner and a tripod with a bunsen burner? I thought of Filtration, Evaporation, Distillation, Magnetism, and even

  10. chemistry 20 MC questions

    1- The equipment needed to carry out a titration is: A) hot plate, pipet, and filter paper B) heat source, test tube, and filter paper C) heat source, pipet, and burette D) erlenmeyer flask, pipet, and burette 2- A student correctly predicted that 10.0 g

  11. Chemistry

    why would you not use filter paper for weighing paper?

  12. Chemistry

    Which of the following statements are true regarding suction filtration? (select all that apply) a) Product should always be rinsed with cold water b) The filter flask can be held in place with your hand c) When filtering is complete you should remove the

  13. Chemistry

    Please can anyone help me with the following: Filter paper is a poor material on which to powder a solid before introducing it into a melting tube. Why? Thank you!

  14. Chemistry

    1. what type of covalent bonded liquid will a polar covalent solid dissolve in? (hint like dissolves like) 2. what type of covalent bonded liquid will a non polar covalent solid dissolve in? (hint like dissolves like) 3. In what type of solvent will a

  15. Technology

    the filter feature excel allows you to look at what data? A. Only the data you select from the filter options B. Only data in the columns labeled filter•• C. Only data that have been sorted first D. Only data in alphabetical order Correct me if I'm

  16. some science

    a filter tip or a cigarette acts as both a filter and a condenser. which of the following cannot be removed, assuming the filter tip is 100% efficient? a. carbon monoxide, boiling point -191 degrees. b. nicotine, boiling point 247 degrees. c. tar, boiling

  17. chemistry - synthesis of aspirin

    I wanted to calculate the theoretical and actual yield of aspirin. mass of salicylic acid = 2.005 g But isn't salicylic acid differ. from acetic acid? If so, how do we find the mass of acetic acid in this experiment volume of acetic anhydride = 4 ml mass

  18. Calculus Practice Problems

    A filter filled with liquid is in the shape of a vertex-down cone with a height of 12 inches and a diameter of 18 inches at its open (upper) end. If the liquid drips out the bottom of the filter at the constant rate of 3 cubic inches per second, how fast

  19. chemistry

    Why is it necessary to wait until the filter paper containing a compound is completely dry before weighing it? and how would it effect the theoretical yield? HIgher?? lower??

  20. Filtration

    Problem: In each of the following situations, what type of filtration device would you use? A. Remove powdered decolorizing charcoal from 20mL of solution? My answer: Filter Aid or Celite (diatomaceous earth) B. Collect crystals obtained from crystallizing

  21. chemistry

    Please be specific! Briefly explain whether each if the following procedural errors would result in a high, low, or an unchanged calculated mass of Ca2+ in the analyzed tablet. a)a student had difficulty decanting the supernatant solution from the test

  22. chemestry

    a watch glass and filter paper weighing 41.060g was used to collect the CuSCN precipitate in this experiment. After drying, the precipitate, watch glass and filter paper weighed 42.525g. If the sample of alloy used for the analysis weighed 1.380g, what was

  23. Chemistry

    We have to conduct a lab experiment for a photochemical reaction. We will be using a redand violet film and filter paper labeled 40W and 60W. On each piece of paper we will add 1 drop of NaCl and AgNO3 and then let it sit under a lamp to see what happens.

  24. physics

    A fish tank has dimensions 36 cm wide by 1.0 m long by 0.60 m high. If the filter should process all the water in the tank once every 4.0 h, what should the flow speed be in the 3.0-cm-diameter input tube for the filter?

  25. physics

    white light goes through a magenta filter, then a cyan filter. draw each step on a diagram. what colors is white light comprised of?

  26. Chemistry

    During this lab, the reaction mix is filtered. Filtration is often used to separate a solid from a liquid. In this lab, when the reaction mix is added to the filter paper, what substance would we try to collect on the filter paper? A. Cu B. NaCl C. Al D.

  27. calculus

    water in a paper conical filter drips into a cup. let x denote the height of the water in the cup. if 10 in^3 of water are poured into the filter, find the relationship between dy/dt and dx/dt so the paper filter is 4 inches tall whith a radius of 2

  28. Chemistry

    he experiment is a sequence of Chemical Reactions. Procedure part A preparation fo copper (II) Hydroxide-get a solution of copper(II)nitrate. measure 25ml of solution. to blue solution add 2mL of concertarted NaOH while stirring. Let mixture settle and use

  29. Chemistry

    If performing a gravimetric sulfate experiment and you use ordinary filter paper instead of ashless filter paper, would results be too high or too low? If I'm trying to calculate percentage of sulfate in a sample and I used ordinary filter paper, the paper

  30. chemistry

    what is the percentage yield for Sr(NO3)2 + Na2SO4 -> SrSO4 + 2 NaNO3. mass of strontium nitrate is 0.788g mass of sodium sulfate is 1.258g mass of dry filter paper 0.759 g mass of dried precipitate in filter paper 1.317g

  31. college chemistry

    Please be specific! Briefly explain whether each if the following procedural errors would result in a high, low, or an unchanged calculated mass of Ca2+ in the analyzed tablet. a)a student had difficulty decanting the supernatant solution from the test

  32. Filtration?

    Question: While performing a crystallization, you obtain a light tan solution after dissolving your crude product in hot solvent. A decolorizing step is determined to be unnecessary, and there are no solid impurities present. Should you perform a

  33. chemistry

    the experiment is a sequence of Chemical Reactions. Procedure part A preparation fo copper (II) Hydroxide-get a solution of copper(II)nitrate. measure 25ml of solution. to blue solution add 2mL of concertarted NaOH while stirring. Let mixture settle and

  34. astronomy

    An Extreme Ultrviolet imager telescope is used to observe the sun and corona.it has four filters which are sensitive to different wavelenghts of UV radiation.These are: filter: 17.1nm 19.5nm 28.4nm 30.4nm Question: which filters are most likely to be of

  35. Chemistry

    A student was tasked to perform gravimetric analysis of a soluble sulfate. His unknown sample weighed 0.7543 g. The sample underwent precipitation using BaCl2 and was digested for overnight. The precipitate was then filtered off to obtain white crystalline

  36. math

    Janine is considering buying a water filter and a reusable water bottle rather than buying bottled water. Will doing so save her money? First, determine what information you need to answer this question, then click here to display that info (along with

  37. Calculus

    A cone-shaped coffee filter is draining at a rate of 20 in^3 /min. The filter has a diameter of 8 inches. the radius of the filter is 2/3 the height. how fast is the coffee level falling when the coffee is 3 inches deep?

  38. science, Chemistry

    Sample Results: Mass (g) Trial 1 Trial 2 Filter paper 1.36 1.29 Filter paper + PbI2 3.20 3.09 PbI2 ? ? Calculations and Discussion Questions: ( show the step by step) 1. Calculate the mass of precipitate collected in Trial 1 and Trial 2. Include these

  39. Math

    Consider a domestic sewage treatment plant in a tropical region at sea level (average temperature 28°C) treating 4500 m3/day of influent, with the following composition: 1400 mg COD/L; 600 mg BOD/L; 750 mg SS/L; 60 mg NH4-N/L, 20 mg PO4-P/L The water is

  40. Chemistry

    Mass of weighed filter paper ? Mass of weighed filter paper plus recrystallized vanillin? Mass of recrystalized vanillin Mass impure vanillin Percent recovery Suggest how you could have improved your techniques to increase your percent recovery.

  41. waste water treatment

    QF Description Wastewater from a small town is treated in a trickling filter which is preceeded by a screen, sand-removal and primary clarification. The maximum hydraulic capacity, or peak flow, of the treatment plant is 1,500 m3/h. The dry weather flow

  42. Math

    A customer's bill for maintenance and repair at a service station showed 6 quarts of oil at $1.15 each an air filter at $3.75 an oil filter at $7.45 13 gallons of gasoline at $1.15 a gallon and 3 hours labor at $37.00 an hour What was the total bill?

  43. chemistry

    if a membrane filter from a cigarette weighs 0.0313g bfore sample has been drawn through and 0.0548g after what is the weight of particluate matter on filter in g and mg/cigarette ? Volume of air sucked through=32x50ml=?mL=?L concentration of particulate

  44. Physical Science Question 1

    What type of light passes through a polarizing filter? Polarized light, polarized in the plane of the filter?

  45. hirsch funnel filter paper

    I used a filter paper that was too large for the Hirsch funnel and had to fold it up around the edges. Why is it bad to fold the edges of the paper? One reason is that it is difficult to "seal" the paper for a proper vacuum to be pulled. Another is that

  46. Calculus 1

    A filter filled with liquid is in the shape of a vertex-down cone with a height of 12 inches and a diameter of 18 inches at its open (upper) end. If the liquid drips out the bottom of the filter at the constant rate of 5 cubic inches per second, how fast

  47. Chemistry

    Why would you use weighing paper instead of filter paper for weighing the unknown sample?

  48. digital photography

    Which type of filter is often used to protect the photographer's lenses? a. ND Graduating Filter b. Polarizing Filter c. Neutral Density Filter d. UV Filter the answer is d UV filter

  49. chemistry - synthesis of aspirin

    This is an experiment for a synthesis of aspirin lab mass of salicylic acid = 2.005 g mass of acetic acid = ? moles of acetic acid = ? volume of acetic anhydride = 4 ml mass of acetic anhydride (Use 1.08 g/ml for the liquid density) = (1.08 g/ml) (4 ml) =

  50. Scince

    am having trouble with Restate the problem in terms of the following: Manipulated variable Constant (control) variables Principles of experimental design State in correct form the hypothesis you intend to demonstrate. I have conducted the experiment but I

  51. chemistry

    The environmental protection agency (EPA) wanted to study the particular materials in the atmosphere in Bogus Basin at 7200 ft elevation. The sampled air rate was at 1.00 liter per minute and was allowed to run 24 hours per day for 30 days. At the end of

  52. chemistry

    Why is filter paper a poor material on which to powder a solid before introducing it into a melting tube?

  53. science

    What type of prac do you think you need to use a filter funnel and filter paper. please help quickly

  54. science

    Which of the following techniques are suitable for online, real-time filtering? Synchronized averaging Derivative-based filter Adaptive filter Moving average filter

  55. chemistry

    Because of the porosity of the filter paper some of the CaC2O4 x H2O precipitate passes through the filter paper. Will the reported percent of the limiting reactant in the original salt mixture be reported too high or too low? explain

  56. Chemistry

    You pipetted 15.0mL of Na2CO3(aq). You then added 20.0mL of Sr(NO3)2(aq). Your dry filter paper was 1.69g. You filter paper and precipitate is 3.76g. What is the concentration of the Na2CO3(aq)?

  57. Technology Education

    the filter feature excel allows you to look at what data? A. Only the data you select from the filter options •• B. Only data in the columns labeled filter C. Only data that have been sorted first D. Only data in alphabetical order Correct me if I'm

  58. HIrsch funnel

    From part of an earlier question: My question: D. What filtration device would you use to isolate 2.0 g of crystals from about 50 mL of solution after performing a crystallization? My answer was a Buchner funnel Your answer: It would need to be a SMALL

  59. Physics

    If the critical frequency of a low-pass filter is 5 kHz, what is the filter bandwidth?

  60. Chemistry

    Here's is what I did: Collect water samples from Farm Lane bridge (500 mL minimum)þ Filter water samples using small mesh filter Note: Weigh the dried filter before filtration! Dry the filter in drying oven (~24 hours)þ Weigh the filter after drying. Day

  61. Chemistry

    --------Materials--------- several black pens of different types 2.0 mL water 2.0 mL rubbing alcohol 2 coffee filters small glass or paper cup --------Procedure-------- You may print this procedure out from Adobe if you wish: chrom.pdf Cut out a

  62. science

    determine the mass of a solid on a filter paper

  63. Chemistry

    I forgot to weigh the mass of filter paper and CaC2O4 before oven drying it. What do i do?

  64. science (chemistry)

    filter paper is a poor material on which to powder a solid before introducing it into a melting tube .explain why?

  65. chemistry

    Recrystallization Lab What are the potential consequences of using a spatula to scrape crystals from wet filter paper during filtration?

  66. Ions & Atoms-Lab Part 1

    We did a lab on Ions and Atoms. The purpose was basically to identify the properties of an ion and compare them to atoms. These were the Materials -safety goggles -apron -copper(II) chloride (CuCl2) -3 250-ml beakers -water aluminum foil -scissors

  67. chemistry; Lab questions help=)

    was hoping someone can help me check if these answers make sense for a silver copper alloy lab. 3. Why don’t you have to weigh the sodium chloride on a sensitive balance? This one I am not sure about, It is because an excess of NaCl is needed to make

  68. Science

    . Which of these processes would NOT be a part of a scientific investigation of an infectious disease? (Points : 1) cataloguing symptoms forming a hypothesis intentionally infecting people researching the disease 2. In an experiment, 20 pea plant seeds

  69. electrical engineering

    Instructions The goal of this project is to design, simulate, build and test a simple speaker system that can connect to a portable audio device such as an mp3 player or laptop. The system has the following requirements: § Accept a standard head-phone

  70. science

    PSD of noise and desired signal is required to design Derivative-based filter Butterworth filter Wiener filter Notch filter

  71. Electronics

    Is a circuit a bandpass filter only when it's a high pass filter followed by a low pass filter? Or can it ever be a low pass filter and then a high pass filter (cascaded together)? Does the order matter if it's then followed by a gain/amplifier stage?

  72. Science- Chemistry

    A test tube containing a mixture of compounds X, Y, and a small amount of Z weighs 25.4886 g. The tube is emptied into a beaker and the empty tube is reweighed, giving a value of 10.2586 g. The mixture is separated into two components by dissolving in

  73. math

    I want to know why [5-5cos(square)(filter)] is equal to [5sin(square)(filter)] Do you guys know what I mean? sorry for that I can't type (square and filter) signs

  74. physics

    (a) A vertically polarized photon goes through two polarizing filters, the first of which is vertically aligned and the second at degrees. What is the probability that the photon is transmitted through both filters? (b) Now, you are allowed to place a

  75. Mathematics Ms Sue help

    A high pass filter with a cutoff frequency of 250 kHz is placed in a circuit after a low pass filter with a cutoff frequency of 150 kHz. Together, these filters create which type of filter?

  76. water treatment

    Which is correct for this trickling filter? a)Due to the low BOD loading rate the biomass growth will be too little. Methanol needs to be dosed to keep the biomass alive. b)Due to the high BOD loading rate the filter might clog. This can be prevented by

  77. Chemistry

    Here's is what I did: Collect water samples from Farm Lane bridge (500 mL minimum)þ Filter water samples using small mesh filter Note: Weigh the dried filter before filtration! Dry the filter in drying oven (~24 hours)þ Weigh the filter after drying. Day

  78. math8

    it costs $20 to replace an air filter on a $20,000 car, ehat percent of the cars value is the price of the air filter?

  79. math

    It cost $20 to replace an air filter on a $20,000 car. What percent of the cars value is the price of the air filter?

  80. Circuits 2

    let R=20kΩ, L=10mH, and C=40μF. Which angular frequency ω is attenuated most by this filter? (It would help you to first identify what type of filter this is.) Give your answer in terms of rad/sec, and omit units from your answer.

  81. Circuits

    How do I design a low pass filter for an Fc = 4000 Hz and a high pass filter for Fc =2000 Hz?

  82. Math

    Need help understanding half-life/decay problem for upcoming test. A water filter is constructed to form a foam that removes 25% of the particulate impurities for each inch of foam. 1.What percentage of the particulate impurities will be removed by a

  83. chemistry

    We can build the model in a spreadsheet simulating ten layers in the filter. For each layer we calculate the headloss with Carmen-Kozeny and calculate from this the pressures as a function of the place in the filter. Calculate the headloss and the actual

  84. Chemistry

    Why is it suggested you use weighing paper or a watch glass instead of filter paper on which to allow a sample to dry? Please give two examples.

  85. Excel Filtering

    Hi I'm trying to filter data between 3 different columns. I want it so the data filtered so data in column a is smaller than column b, which is smaller than column c. I try to filter but it only allows me to use filter criteria from the individual column.

  86. Chemistry

    The capacity of the groundwater treatment plant has recently been expanded to receive an additional 50,000 m3/year. As a result, all of the 6 rapid sand filtration are being operated. Assume a peak flow factor of 1.5. If the filtration rate is 5 m/h, what

  87. Water Treatment, Chemistry

    The capacity of the groundwater treatment plant has recently been expanded to receive an additional 50,000 m3/year. As a result, all of the 6 rapid sand filtration are being operated. Assume a peak flow factor of 1.5. If the filtration rate is 5 m/h, what

  88. Water treatment

    The capacity of the groundwater treatment plant has recently been expanded to receive an additional 50,000 m3/year. As a result, all of the 6 rapid sand filtration are being operated. Assume a peak flow factor of 1.5. If the filtration rate is 5 m/h, what

  89. Physics

    You are an explorer on a tiny planet with no atmosphere. You drop a coffee filter and find that it falls 2.0m in 1.6s. As you were approaching the planet, you measured the radius to be 1.8x10^6 m. What is the mass of the planet? So I used the 2.0m and 1.6s

  90. chemistry

    mixed about the 5grams of benzois acid and sugar. divide the mixture into two equal portions . to thheh first portion add 20ml of water. shake vigorously and filter. examine the residue and compare with the original sample. heat the filter to dryness and

  91. Organic Chemistry

    Please can anyone help me with the following: Filter paper is a poor material on which to powder a solid before introducing it into a melting tube. Why? Thank you!

  92. Science- Chemistry-Candy Chromatography

    What complications may have arisen if you had used a ball pen instead of a pencil in labeling the filter paper? Explain.

  93. science

    Why is filter paper a poor material on which to powder a solid before introducing it into a melting tube?

  94. Biology-9th grade

    I'm not sure how to answer one of my homework questions. Is one function of the alveoli to filter out dirt and pollen before it reaches the lung and why or why not. I don't think it is because the alveoli are used to oxgenate the blood, correct. I don't

  95. Biology

    I'm not sure how to answer one of my homework questions. SraJMCGIN was nice enough to direct me to a site but I already had been there. My teacher kinda of indicted it was true but I don't know how it can- could someone take a second look, please at this

  96. science

    If you place a green filter in front of a white light and shine it on a pink flower,what colour will it change into.what effect did the green filter have on the pink flower.Explain the reason for the change in colour..THANK YOU:-)

  97. physics

    The sugar concentration in a solution (e.g., in a urine specimen) can be measured conveniently by using the optical activity of sugar and other asymmetric molecules. In general, an optically active molecule, like sugar, will rotate the plane of

  98. physics

    The sugar concentration in a solution (e.g., in a urine specimen) can be measured conveniently by using the optical activity of sugar and other asymmetric molecules. In general, an optically active molecule, like sugar, will rotate the plane of

  99. physics Damon???

    The sugar concentration in a solution (e.g., in a urine specimen) can be measured conveniently by using the optical activity of sugar and other asymmetric molecules. In general, an optically active molecule, like sugar, will rotate the plane of

  100. much needed help...

    The sugar concentration in a solution (e.g., in a urine specimen) can be measured conveniently by using the optical activity of sugar and other asymmetric molecules. In general, an optically active molecule, like sugar, will rotate the plane of

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