1 a) What is an advantage of using fluted filter paper in gravity filtration rather than...
1 a) What is an advantage of using fluted filter paper in gravity filtration rather than using a filter paper simply folded into quarters?
b) When pouring slowly from a beaker, a stirring rod is used to direct the flow of the liquid from the beaker to the funnel. What is the best way to hold the stirring rod vertically or at a 45 degree angle?
Homework Answers
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1 a) What is an advantage of using fluted filter paper in
gravity filtration rather than...
EXPERIMENTAL PROCEDURE 1. Using a 50.0 mL graduated cylinder, obtain 40.0 mL of the unknown water...
EXPERIMENTAL PROCEDURE 1. Using a 50.0 mL graduated cylinder, obtain 40.0 mL of the unknown water sample. This ample contains an unknown amount of BaCh, Pour this into a 100 mL beaker 2. Add 20.0 ml. of the NasPO solution provided to your unknown solution in the 100 ml, beaker The amount of NaPOs you are adding in the 20.0 ml, of solution is more than enough to provide for complete reaction of the unknown BaClh, Consequently, you can be...
THE EMPIRICAL FORMULA OF SELECTED HYDRATES experiment PROCEDURE THIS EXPERIMENT SHOULD BE DONE IN PAIRS. 1....
THE EMPIRICAL FORMULA OF SELECTED HYDRATES experiment PROCEDURE THIS EXPERIMENT SHOULD BE DONE IN PAIRS. 1. Available to you should be: a Büchner funnel, a rubber funnel adapter, side-arm filter flask, thick-walled rubber tubing, plastic forceps and a plastic spatula. 2. Before you turn the hotplate on, wipe the hotplate down with a damp paper towel. During this experiment you will be placing filter paper containing products directly onto the surface of the hotplate. As such, you will want to...
ALL THE INFO YOU NEED IS BELOW average volume of NaOH: 15.7 mL or 0.0157 L...
ALL THE INFO YOU NEED IS BELOW
average volume of NaOH: 15.7 mL or
0.0157 L
average number of moles of NaOH added:
6.28*10-4 moles
molar concentration of [HT] in saturated solution(HT–
acts as a monoprotic acid, reacting with NaOH in a 1:1 ratio
(Volume of KHT measured using 25.00 mL volumetric pipet.)):
0.2512 M
Analysis of KHT in water
1. Weigh out 0.8 grams of potassium hydrogen tartrate (KHT) on
weighing paper. Add the KHT to a clean dry...
10. The advantage of using HEPA filter respirators rather than surgical masks is that: 1. Surgical...
10. The advantage of using HEPA filter respirators rather than surgical masks is that: 1. Surgical masks are too expensive for routine use 2. HEPA filter respirators protect the caregiver by filtering inspired air 3. Surgical masks protect the caregiver against tuberculosis but not other infections 4. HEPA filter respirators protect the patient but not the caregiver 9. Which statement is true regarding the need to use Standard Precautions? 1. Standard Precautions are required only when caring for patients who...
Which of the following techniques will not be used in the Ferrofluid experiment? --------- decanting pipetting...
Which of the following techniques will not be used in the Ferrofluid experiment? --------- decanting pipetting vacuum filtration centrifuging Which of the follow is not true about ferrofluids? --------- Ferrofluid has the fluid properties of water and the magnetic properties of magnetite. The particle size of the magnetite is in the microscale range The magnetite in the ferrofluid will permanently stain clothing. The properties of the ferrofluid are extremely sensitive to the care and precision with which the procedure is...
Experiment 17A. A Solubility Product Constant Procedure Getting Started 1. Obtain a 10 ml pipet, ...
question#1
Experiment 17A. A Solubility Product Constant Procedure Getting Started 1. Obtain a 10 ml pipet, a 50 mL buret, and 2 pieces of 120 cm filter paper Preparing Saturated Solutions of M10J MIO), is an insoluble divalent iodate salt. The identity of the cation M-is unknown. 1 Prepare MIO,), by adding S0 ml of o.2 M KIO, to 20 mL of 1 Molar M(NO,J, in a 150 mt 2. Stir the mixture vigorously with a stirring rod. A white,...
#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...
Calculate the % Al in the sample. Preparation of a stock solution of aluminum Accurately weigh...
Calculate the % Al in the sample. Preparation of a stock solution of aluminum Accurately weigh out approximately 1 g of the aluminum foil. Tear it up into small pieces, place the pieces into a covered 250 mL beaker and add 60 mL of 6M HCl. This should be carried out in the fume hood because the reaction is exothermic and leads to violent frothing and emission of vapors. Cool, quantitatively transfer to a 250 mL flask, rinsing with deionized...
Please help! (These are the instructions I had) 1) Preparation of K2[Cu(C2O4)2] 2H2O CuSO4•5H2O + 2K2C2O4•H2O...
Please help! (These are the instructions I had) 1) Preparation of K2[Cu(C2O4)2] 2H2O CuSO4•5H2O + 2K2C2O4•H2O → K2[Cu(C2O4)2]•2H2O + K2SO4 + 5H2O Heat a solution of 2.5g of potassium oxalate monohydrate in 12.5mL of water contained in a 50mL beaker (approx. 90°C). Heat 1.55g of copper sulfate pentahydrate in 3mL of water to about 90°C and add it rapidly, with vigorous stirring to the hot potassium oxalate solution. Set on the bench and allow to cool to room temperature then...
4. In parts I and II of this experiment, were the same atoms oxidized? Explain. 83...
4. In parts I and II of this experiment, were the same atoms oxidized? Explain. 83 When this reaction occurs, the Zn atom loses two electrons. Two fodine atoms pick up one electron cach from the Zn. In the second part of the experiment the Znly that you formed will undergo electrolysis using a battery to decompose into elemental zinc cathode. These electrons are picked up by Zn2+ sons producing metallic Zn, which accumulates on the copper cathode. Zn2+ +...
EXPERIMENTAL PROCEDURE 1. Using a 50.0 mL graduated cylinder, obtain 40.0 mL of the unknown water sample. This ample contains an unknown amount of BaCh, Pour this into a 100 mL beaker 2. Add 20.0 ml. of the NasPO solution provided to your unknown solution in the 100 ml, beaker The amount of NaPOs you are adding in the 20.0 ml, of solution is more than enough to provide for complete reaction of the unknown BaClh, Consequently, you can be...
ALL THE INFO YOU NEED IS BELOW
average volume of NaOH: 15.7 mL or
0.0157 L
average number of moles of NaOH added:
6.28*10-4 moles
molar concentration of [HT] in saturated solution(HT–
acts as a monoprotic acid, reacting with NaOH in a 1:1 ratio
(Volume of KHT measured using 25.00 mL volumetric pipet.)):
0.2512 M
Analysis of KHT in water
1. Weigh out 0.8 grams of potassium hydrogen tartrate (KHT) on
weighing paper. Add the KHT to a clean dry...
10. The advantage of using HEPA filter respirators rather than surgical masks is that: 1. Surgical masks are too expensive for routine use 2. HEPA filter respirators protect the caregiver by filtering inspired air 3. Surgical masks protect the caregiver against tuberculosis but not other infections 4. HEPA filter respirators protect the patient but not the caregiver 9. Which statement is true regarding the need to use Standard Precautions? 1. Standard Precautions are required only when caring for patients who...
question#1
Experiment 17A. A Solubility Product Constant Procedure Getting Started 1. Obtain a 10 ml pipet, a 50 mL buret, and 2 pieces of 120 cm filter paper Preparing Saturated Solutions of M10J MIO), is an insoluble divalent iodate salt. The identity of the cation M-is unknown. 1 Prepare MIO,), by adding S0 ml of o.2 M KIO, to 20 mL of 1 Molar M(NO,J, in a 150 mt 2. Stir the mixture vigorously with a stirring rod. A white,...
#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...
4. In parts I and II of this experiment, were the same atoms oxidized? Explain. 83 When this reaction occurs, the Zn atom loses two electrons. Two fodine atoms pick up one electron cach from the Zn. In the second part of the experiment the Znly that you formed will undergo electrolysis using a battery to decompose into elemental zinc cathode. These electrons are picked up by Zn2+ sons producing metallic Zn, which accumulates on the copper cathode. Zn2+ +...
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