A chemical factory has been illegally disposing their chemical wastes without necessary pretreatments directly onto a river. To assess the extent of contamination, the H+ concentration of the river at 4 different sampling sites were obtained and shown below. Complete the table with the missing data. Site A В D Distance from the chemical 0 km 2.0 km 4.0 km 8.0 km factory [H+], mol/L 3.16 x 102 3.98 x 103 2.00 x 10-5 2.51 x 108 pH pOH

A chemical factory has been illegally disposing their chemical wastes without necessary pretreatments directly onto a river. To assess the extent of contamination, the H+ concentration of the river at 4 different sampling sites were obtained and shown below. Complete the table with the missing data. Site A В D Distance from the chemical 0 km 2.0 km 4.0 km 8.0 km factory [H+], mol/L 3.16 x 102 3.98 x 103 2.00 x 10-5 2.51 x 108 pH pOH

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter3: Statistical Tests With Excel

Section: Chapter Questions

Problem 6P

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3.A sample is known to contain NaOH, Na2CO3 NaHCO3 or compatible mixture of these together with inert matter. With methyl orange, a 1.100 g sample requires 31.40 mL of HCl ( 1.00 mL is equivalent to 0.0140g CaO). With phenolphthalein indicator, the same weight of sample requires 13.30mL of the acid. What is the percent composition of the sample? ww ww
Home | MyFrancis + X app.101edu.co Aktiv Chemistry X b Home | bartleby Initial (M) Change (M) Equilibrium (M) -8.76 x 10-5 Determine the value of Ksp for SrF2 by constructing an ICE table, writing the solubility constant expression, and solving the expression. Complete Parts 1-2 before submitting your answer. 0 1 -8.76 x 10-4 NEXT > It is found that up to 0.0110 g of SrF2 dissolves in 100 mL of aqueous solution at a certain temperature. Fill in the ICE table with the appropriate value for each involved species to determine concentrations of all reactants and products at this temperature. SrF₂(s) 0.0110 X -1.75 x 10-4 + Q Search Question 3 of 11 8.76 x 10-5 -1.75 x 10-³ Sr²+ (aq) 2 8.76 x 10-4 1.75 x 10-4 + 1.75 x 10-³ 2 F-(aq) ✓ RESET -0.0110 ☆ I x Submit 4:25 PM 3/21/2023
Calculate the percentage CH3COOH in a sample of vinegar from the following data.Sample = 15.00 g, NaOH used = 43.00 ml ; 0.600 N H2SO4 used for back titration =0.250 ml ; 1.00ml NaOH is equivalent to 0.0315 g H2C2O4. 2H2O.
Formulate a hypothesis regarding the solubility of aspirin at different pH.The experimentA) Three teaspoons of water (approx. 15 ml) were added to one tablet said to contain 300 mg of aspirin. Fizzingwas observed. Most of the tablet dissolved, but there were some solid particles. By heating the mug in amicrowave for 10 second increments until the water came to the boil (approx. 3x), all of the solid particlesdissolved. The solution was left to cool to room temperature and then placed in a fridge and NOTHINGHAPPENED. Try this yourself if you can spare two aspirin tablets, your results might look different.• Questions to ask:1. What might the fizzing bubbles be?2. Can you give a chemical explanation?3. Can you write a chemical reaction equation with aspirin reacting with something to give a gas and aspirinin another form?4. What might be the formulation (what the manufacturer mixes with aspirin in making the tablet) “trick”for aspirin to improve solubility?5. How does this compare with…
3. To 20,00 ml of 0,1250 mol/l solution of silver nitrate – 25,00 ml of 0,1000 mol/l solution of potassium thiocyanate were added. Calculate pAg of this mixture. pKs(AgSCN) = 11,97 Express numerical result with an accuracy of: Х,ХX
A sample solution is prepared by combining (4.770x10^0) mL of (4.0900x10^-3) molar SCN-, (4.900x10^0) mL of (1.13x10^-1) molar Fe3+, (4.880x10^0) mL of 1.0 molar HNO3, and (1.0500x10^1) mL water. Based on this information, what is the initial concentration of SCN-? Answer in scientific notation.
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A chemist receive different mixtures for analysis with the statement that it contain NaOH, NaHCO3 , Na2CO3 or compatible mixtures of these substances together with the inert material. From the data given, identify the respective materials and calculate the percentage of each component. 1.000g samples and 0.2500 N HCl were used in all cases. Sample 1 With phenolphthalein as the indicator, 24.32 ml of HCl was used. A duplicate sample required 48.64 ml HCl using methyl orange as the indicator. Sample 2. With phenolphthalein as the indicator it uses 28.2 ml of HCl to make it colorless and added with methyl orange indicator and uses 11.3 ml of HCl to reach the end point.
Formulate a hypothesis regarding the solubility of aspirin at different pH. The experiment A) Three teaspoons of water (approx. 15 ml) were added to one tablet said to contain 300 mg of aspirin. Fizzing was observed. Most of the tablet dissolved, but there were some solid particles. By heating the mug in a microwave for 10 second increments until the water came to the boil (approx. 3x), all of the solid partides dissolved. The solution was left to cool to room temperature and then placed in a fridge and NOTHING HAPPENED. Try this yourself if you can spare two aspirin tablets, your results might look different. Questions to ask: 1. What might the fizzing bubbles be? 2. Can you give a chemical explanation? 3. Can you write a chemical reaction equation with aspirin reacting with something to give a gas and aspirin in another form? 4. What might be the formulation (what the manufacturer mixes with aspirin in making the tablet) "trick" for aspirin to improve solubility? 5. How does this…
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Directions: Solve the problem with a complete step-by-step solution. A 100.0-mL sample of brackish water was made ammoniacal, and the sulfide it contained was titrated with 16.47 mL of 0.02310 M AgNO3. The analytical reaction is 2Ag+ + S2- ---> Ag2S (s)Calculate the concentration of H2S in the water in parts per million, cppm.