9. PROBLEM SOLVING: 1. a 20 mL of EDTA titrant is required to titrate 40 mL of standard 0,25M CaCO3. A 70 mL hard water sample requires 35 mL of this EDTA titrant for total hardness determination. Calculate (a) ppm Ca, (b) ppm CaCO3 in the sample.
Q: ne more electronegative (a) F vs. N in each pair. (b) Si vs. C (c) O vs. Cl
A: Electronegativity is the tendency to attract electrons in the bonded atoms. In periodic table, Left…
Q: In cyclic voltammetry, if we do not obtain reduction minima: the run is wrong We ran it at the…
A: Cyclic voltammetry is a special kind of voltammetry. It is performed when the voltage is in excess…
Q: lowing gases in order of increasing average molecular speed a 6, Xe, CCl₂ F2. < < <
A:
Q: Draw the possible hydrogen bonding interactions between molecules A and B. Draw the possible…
A:
Q: Among the butane conformers, which occur at energy maxima on a graph of potential energy versus…
A:
Q: 4. In the following, indicate the most acidic H in each molecule and then circle the molecule is the…
A: In ARIO principle- A stands for Size and electro negativity of at R is for resonance I is for…
Q: 604+ 2NaOH → Na₂SO4 + 2H₂O licate when the equivalence point is going to be reached if at the…
A: Equivalence point is the point where the acid and base are completely neutralised.
Q: 2. Circle the molecule that would undergo the fastest E2 reaction. Provide an explanation, using…
A: For the elimination to occur via E2 the leaving group must be axial.
Q: SO₂(g) + Cl₂(g) = SO₂Cl₂(g) ΔΗ° = −264 kJ K = 34.5 When the reaction is altered, as below, what is…
A:
Q: It is desired to inflate a baggie with a volume of 993 milliliters by filling it with neon gas at a…
A: Given Data :
Q: CI ч CH₂CH₂CH₂CH3 CH3 CH3
A:
Q: 2H₂(g) + S₂(g) = 2H₂S(g) K = 1.08 x 107 The current concentrations for the system are given below.…
A:
Q: Which of the following statements is true for real gases? Choose all that apply. As attractive…
A: Statements that is true for real gas are as follow.
Q: :0: Hill Si Н Si Н Н H-B Н В Н
A: Formal charge is the partial or Imaginary charge present on an atom in the compound.
Q: Draw a line formula corresponding to the following condensed structural form…
A: The line formula of the given condensed structural formula is:
Q: 1. Provide the structure of the product. Determine whether the reaction involves either carbocation,…
A: Given in following question some reaction and it's reagent give product and intermediate involved…
Q: Consider the redox equation: Zn + CrBr3 —> ZnBr2 + Cr I. Which is the oxidizing agent? II. What…
A: Given that, a redox reaction is Zn + CrBr3 → ZnBr2 + Cr. We have to tell the name of the oxidizing…
Q: Louve the mnit tconic A1³+, Co₂²/ Cervation of NaOH and 202 reactal with A13+ Cr3+, Fe3+, mn²+, Ni24…
A:
Q: Calculate the energy required to heat 1.10 kg of water from 49.1 °C to 62.6 °C. Assume the specific…
A:
Q: If a species has an atomic number of 9, a mass number of 18, and a charge of -1 , which of the…
A:
Q: A high altitude weather balloon filled with helium, He, collects data as it rises through the…
A:
Q: A nitrogen sample occupies 236 mL at STP. If the same sample were collected over water at 25°C and…
A:
Q: Differentiate reducing agent and oxidizing agent.
A: Given reducing agent and oxidizing agent We need to write difference between reducing agent and…
Q: Is it possible to have a reaction in which oxidation occurs and the reduction does not? Explain
A: Oxidation is loss of electron, addition of oxygen and removal of hydrogen. Reduction is addition of…
Q: A pellet containing 14.2% by mass NaCl and the rest is KCI is dissolved in a silver nitrate…
A:
Q: Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric…
A: The ideal gas equation shows the relation between pressure, volume, temperature and no of moles of…
Q: 1) For the following cell at Zn(s) | ZnCl₂(aq) || AgCl (aq) | Ag(s) a) Write the half-reactions; b)…
A:
Q: OSTATES OF MATTER = Calculating mass percent composition A chemist mixes 74.9 g of water with 80.1 g…
A: Given: The mass of water in the solution = 74.9 g The mass of 2-methylpyrazine in the solution =…
Q: A sample of oxygen gas was collected via water displacement. Since the oxygen was collected via…
A: Here we are required to find the partial pressure of oxygen.
Q: TRUE OR FALSE: The half-life of a first-order reaction, with respect to only one reactant, is…
A:
Q: A sample of hydrogen gas collected at a pressure of 0.906 atm and a temperature of 12.0 °C is found…
A:
Q: 5. a. For an electron in a hydrogen atom, what term symbols are expected for an electron in the 4f…
A: 1)Term symbol 2)Possible set of individual angular momentum and spin
Q: What is the total volume of gaseous products formed when 127 liters of bromine trifluoride react…
A: 2BrF3(g) = Br2(g) + 3 F2 (g) Now using reaction stoichiometry we can calculate the volume of gaseous…
Q: Solid ammonium chloride, NHCl, is formed by the reaction of gaseous ammonia, NH3, and hydrogen…
A: Here we are required to find the mass of ammonium chloride produced from the synthesis reaction
Q: CaSO4(s) Ca²+ (aq) + SO3- (aq) K = [Ca ²+ ][SO²-] K= 3.2 x 10-5 R CaSO4(s) Ca2+(aq) + SO² (aq) I (M)…
A:
Q: the box to the right of each molecule, draw a constitutional (structural) isomer of it Fr: 0:
A: Structural isomers are the isomers that has the same molecular formula but different bond…
Q: Soog x 10369 14539 = 0.5kg 1. Calculate the kinetic energy (in J) of a bird weighing 500 g flying at…
A: Given -> Weight= 500 gm = 0.500 kg (1kg=1000gm) Velocity= 60.0 m/s
Q: Question 10 Which of the following are acid-base reactions? A K₂P (s) +20₂(g) → K₂PO4(s) 3KOH(aq) +…
A: We have to select the acid base reaction
Q: (b) Suppose the laboratory Technician carried out the same titration experiment in which he/she…
A:
Q: For many purposes we can treat methane (CH) as an ideal gas at temperatures above its boiling point…
A:
Q: YouTube Maps MyCSU Columbus... - B Homepage - Georg... W Microsoft Of MATTER mass percent…
A: Solution is made up of solute and solvent. Solute is present in small amount and solvent is present…
Q: An aqueous solution of KCI (molar mass 74.5 g/mol) has a concentration of 1.85 m. If this solution…
A:
Q: (i) how many π bonds does the molecule have? (ii) how many unhybridized p-orbitals total does the…
A: I have given a detailed solution to the question as follows:
Q: opy, mm. The colored 100 The absorbance falls to 0.229 at 35.4 min. Calculate the rate constant in…
A: Given data set: Extinction coefficient = 5100 cm-1 M-1 Wavelength= 520 nm Path length = 1.17 cm…
Q: 25.0 mL of a 0.200 M solution of Ba(NO3)2 is mixed with 15.0 mL of a 0.300M solution of Na2SO4. The…
A:
Q: of measurements below, which measurement is greater? 1.25 atm or 105.325 kPa Question 15…
A:
Q: 11) 4² Question 38 of 48 Match this condensed formula, (CH₂)₂CHCH₂CH₂OH, with the correct skeletal…
A: The correct skeletal drawing for given condensed formula is
Q: A 2.02 g sample of aluminum reacts with excess of HCl(aq), and the liberated hydrogen gas is…
A: Given, 2Al(s) + 6 HCl(aq) -------> 2 AlCl3(aq) + 3 H2 (g) The mass of Al = 2.02 g. At…
Q: True or false. According to the collision theory, product formation is only possible if the…
A: There are following postulates of collision theory - (1) All reacting Molecules considered as a…
Q: A sample of nitrogen gas occupies a volume of 9.07 L at 41.0°C and 1.27 atm. If it is desired to…
A: According to the ideal gas equation PV= nRTWhere P= pressure of the gas V= volume of the gas n= no…
Step by step
Solved in 2 steps with 2 images
- Please answer this NEATLY, COMPLETELY, and CORRECTLY for an UPVOTE. A 50.00-mL sample of water containing Ca2+ and Mg2+ is titrated with 10.28 mL of 0.01001 M EDTA in an ammonia buffer at pH 10.00. Another 50.00-mL sample is titrated with NaOH to precipitate Mg(OH)2 and then titrated at pH 13.00 with 6.75 mL of the same EDTA solution. Calculate the concentration of CaCO3 and MgCO3 in the sample in ppm.Solve and write the complete solution: 1. A 100.0 ml sample of drinking water was buffered at pH 10.0 and after addition of calmagite indicator, required 38.41 ml of 4.652 x 10-3 M EDTA for titration. Calculate the total hardness of water as indicated a.) ppm CaCO3 b.) ppm CaOStandard solution : 0.201 grams of acetylsalicylic acid was combined with 10 mL of 0.5 M NaOH, then transfered to a 100 mL flask and filled the rest of the way with water Then 0.500 mLs of the standard solution was transfered to a 10.00 mL flask and diluted to the 10 mL mark with 0.02 M of buffered iron chloride. This step was repeated using 0.400, 0.300, 0.200, 0.100 mLs of the standard solution Questions: A.) determine the concentration of the acetylsalicylic acid in the 100.00 mL volumetric flask containing the solution from which the standards were made. B.)determine the concentration of the acetylsalicylic acid in each of the 10.00 mL calibration solutions. I only need the work for 0.400 mLs C.)Make a scatter plot (on the computer again) of absorbance versus concentration for the calibration samples. On the plot, add a linear trendline, and display the equation and the R2 value on the chart. Take your time to label the axes
- An automatic titration was performed with the following results: Standardized NaOH Concentration: 0.1191 M Volume of HA- product examined in each trial: 25.00 mL Volume of Standardized NaOH Titrant used to achieve the first equivalence point: Trial #1: 1.300 mL Trial #2: 1.137 mL Trial #3: 1.140 mL Calculate the Molarity for each trial, Average Concetration (M), Deviation (M), Standard Deviation (M), and RSD (M)As a chemist, you know that when analyzing a 50-ml sample for total hardness, every milliliter (1.00 mL) of EDTA titrant removes an equivalent of 20 ppm CaCO3. What would be the total hardness of a sample if a total of 24.57 mL titrant was used? Based on the preceding question, if 0.25 mL was used in the blank titration to achieve the same end-point color, what will be the correct total hardness of the sample?A deepwell water sample of 100 mL was titrated with 0.010 M EDTA at pH 10 ( with Mg-EDTA pH 10 buffer reagent) and consumed 31 mL. Calculate the Total Hardness of the water sample as mg CaCO3. Ans in 3 sig figures. no need to write the unit.
- The B4O5(OH)4^2- ion, present in 5.0 mL of a saturated Na2B4O5(OH)4 solution at a measured temperature, is titrated to the bromoscresol green endpoint with 5.25 mL of 0.182 M HCL. What is the Ksp for Na2B4O5(OH)4?a 20 mL of EDTA titrant is required to titrate 40 mL of standard 0,25M CaCO3. A 70 mL hard water sample requires 35 mL of this EDTA titrant for total hardness determination. Calculate (a) ppm Ca, (b) ppm CaCO3 in the sample.A 50.0ml sample of water containing both Ca+2 and Mg+2 is titrated with 16.54ml of 0.01104M EDTA in an ammonia buffer of pH 10. Another 50.0ml sample is treated with NaOH to precipitate the Mg(OH)2 and then titrated at pH 13 with 9.26ml of the same EDTA solution. Calculate the ppm each of CaCO3 and MgCO3 in the sample.
- A 0.2700 g of impure Na2CO3 required 24.12 mL of 0.1684M HCl and a back-titration with 2.96 mL NaOH solution. The volume ratio of the acid to the base is 1.250. Calculate %Na2CO3 in the sample.1) Calculate the total hardness for the first sample (Sample Volume,V : 50 mL,Volume of EDTA titrant used for the sample, A:9.6 mL) 2)Calculate the calcium and magnesium concentrations for the first sample in the video in meq/L and mg CaCO3/L.(Sample Volume= 50 mL, Magnesium hardness titrant volume = 0 mL, Calcium hardness titrant volume:2,6 mL) 3)Assuming the pH and alkalinity of the first sample in the video are 7.5 and 100 mg CaCO3/L, respectively, calculate the temporary and permanent hardness values for this sample 4How much CaCL2 in meq/L should be added to the sample to equalize calcium and magnesium hardness? Which hardness level (soft, medium, hard, very hard) does the sample belong to after this addition?A 50.00 ml aliquot of a solution containing Ca2+ and Mg2+ was buffered at pH 10 and titrated with 0.0418 M EDTA. The endpoint volume was 44.36 ml. A second aliquot of the same mixture was made strongly basic by the addition of NaOH – this causes the Mg2+ to precipitate as Mg(OH)2. The solution was then titrated with the 0.0418 M EDTA and the endpoint volume was found to be 30.02 ml. Calculate the molar concentration of Mg.