_ In the titration why the colour changes from wine red to bue? 2_what are the harmful effects of hard water? 3_write the principle involved in hardness of water by EDTA method?

Q: lution. What is the to

A: Concentration of CaCO3 Solution = 0.3834/100 = 3.834 x 10-3 M

Q: What is the titer value for 0.05 M calcium chloride with 2 moles of water? MW= 142.9

A: The balanced chemical equation of reaction between calcium chloride and water can be shown as…

Q: Calculate the concentration of an unknown solution if the titration used 4.6 mL of DCPIP solution to…

A: Introduction: A titration is a method used to find the unknown concentration of the solution from…

Q: What is the correct order of performing EDTA titration? I. Titrate milk sample aliquot with standard…

A: Steps for performing EDTA titration  Weighing Preparation of standard solution Standardization of…

Q: A RbOH solution is titrated four (4) times against potassium hydrogen phthalate (KHP; FW=204.224)…

A: The given data is:   Mass of KHP(g) Volume of RbOH(mL) Trial-1 0.5373  42.49  Trial-2 0.5856…

Q: 3. A 100 mL sample of hard water is titrated with 22.4 mL of the EDTA solution from problem 2. The…

A: Answer :

Q: Find the concentration of 50.0 ml of an acidified Fe2+ solution if 18.72ml of 0.01500M solution of…

A: According to the mole concept, in terms of mass, the amount of substance in moles is equal to the…

Q: Calculation of the Solubility from EDTA Titration Data 1. A 10.0 mL sample of supernatant liquid was…

A:

Q: find the total hardness for water of lake contains (9.83 x10* ( m) of hco3, (1.25x 10 m) of…

A: Solution - According to the question - Given - The hardness of water is the sum of the…

Q: 5. 20 mL of tap water sample is taken in a conical flask and 1 mL of pH 10 buffer and 3 drops of…

A: Hard water is the water that contains dissolved Ca2+ and Mg2+ ions. These ions react with fatty…

Q: a 20 mL of EDTA titrant is required to titrate 40 mL of standard 0,25M CaCO3. A 70 mL hard water…

A:

Q: In titration of 100 ml 0.3 Mn2+ with 0.7 M EDTA (pH = 7), when 50 ml EDTA is added what is pMn²+? a.…

A: Given in following question titration of 100ml 0.3 Mn+2 with 0.7 MEDTA pH=7 when 50 ml EDTA is added…

Q: At 40.0 mL 0.0050 M Sr2 + pH 10, 0.0100 M EDTA is titrated. Calculate the pSr for the equivalence…

A: This is the titration between Strontium ions and EDTA solution. Sr²+ forms complex with EDTA. we…

Q: 6) Why EBT indicator is not used for the determination of Ca-hardness?

A: An indicator is a compound which combines with metal in complexometric titration and in the free…

Q: A student titrated a 25.00 mL sample of water with 0.0200 M EDTA. The titration required 20.40 mL of…

A: This is a simple volumetric titration,  using M1V1=M2V2 we can obtain the strength of water sample.…

Q: 6. 20 mL of tap water sample is taken in a conical flask and 1 mL of pH 10 buffer and 3 drops of…

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 8.A 75mL sample of water is titrated with 0.100M EDTA. exactly 16.9mL of EDTA are required to reach…

A: Answer:- This question is answered by using the simple concept of calculation of hardness using the…

Q: pH 10 buffer

A: Eriochrome Black T (EBT) is a complexometric indicator that is used in complexometric titrations.…

Q: You are doing a titration for a 16 ml mixture solution of 0.097 M in CI and 0.100 M in I' titrated…

A: pAg value of a titration solution is the negative value of the logarithm of the concentration of Ag+…

Q: 5. A student titrated a 25.00 mL sample of water with 0.0100 M EDTA. The titration required 16.40 mL…

A: Mole is the amount of the substance that contains the same number of particles or atoms or…

Q: At 40.0 mL 0.0050 M Sr2 + pH 10, 0.0100 M EDTA is titrated. Calculate the pSr for the equivalence…

A: We have been given a Strontium solution whose concentration and volume is known. we need to…

Q: According to the following figure, an adequate end-point for the titration of calcium with EDTA…

A: End point is the point where the indicator changes colour and we know that this point Comes after…

Q: Consider the titration of 25.00 mL of 0.03555 M Co2+ by 0.02784 M EDTA at pH 10.00. Kf is 1045.…

A: The amount of EDTA required to reach the endpoint of the titration is determined as shown below.…

Q: A commercial lab received a batch of industrial wastewater samples for analysis. John plans to test…

A: The chemical equation for the reaction between EDTA and Ca2+ is:   Ca2+  +   EDTA ---->…

Q: 50 mL of a sample known to contain Mg+2 was taken and titrated with 0.075 M EDTA standard solution…

A: We have given that Molarity of EDTA = 0.075M Volume of EDTA used = 10.5mL Volume of sample taken =…

Q: In Fajans-Fisher-Khodakov method titrant is: AGNO; solution; KSCN solution; Hg2(NO;)2 solution; NaCl…

A: In Fajan- Fischer- khodakov, titration is a type of precipitation titration.

Q: You are going to analyze a substance with the following structure. What method will be best used?…

A: The solubility of a substance in a particular solvent to yield the solution depends on the nature of…

Q: In the titration of 25.00 mL of a water sample, it took 20.840 mL of 4.350x 10−3 M EDTA solution to…

A: The molarity of a solution is the ratio of number of moles of a substance to the volume of solution…

Q: A solution of a fictitious silver salt, AgX, in pure water has a concentration of silver ions of…

A: There are some salts which are sparingly soluble in aqueous solutions. Which means at equilibrium…

Q: You want to measure the concentration of carbonate (CO32-) in a mildly basic solution by using an…

A: The concentration and the number of moles of Ca2+ ion in the filtered solution is;…

Q: 50.00 mL of 0.1000 M Ti2+ solution is titrated with 0.1000 M Sn4+ solution. Find the concentration…

A:

Q: 3. A 100-mL sample of hard water is titrated with the EDTA solution in problem 2. The same amount of…

A: Solution for Q3 and parts are asked.

Q: are doing a titration for a 30.00 ml mixture solution of 0.171 M in X and 0.100 M in CN titrated…

A:

Q: Considering the graph given, what is the most suitable pH for the titration of calcium with EDTA?

A: pH 10 buffer is used in EDTA titration because in EDTA Y4- is predominant, and we want Y4- to react…

Q: Which of the following EDTA titration formats can be used when the analyte reacts too slowly with…

A: EDTA titration formats can be used when the analyte reacts too slowly with EDTA name of the…

Q: In the titration of 25.00 mL of a water sample, it took 19.990 mL of 3.480x 10−3 M EDTA solution to…

A: we know that moles = concentration x volume (ml) / 1000 so moles of EDTA = 3.480x 10−3  * 19.990 /…

Q: The titration of Zn+2 and EDTA is carried out in the same manner as Mg2+ - EDTA titration (in fact,…

A: Zn+2 and Mg+2 form complexes with EDTA. The balanced equations are Zn+2 (aq) + EDTA–4 (aq)…

Q: Titration of 0.2121 g of primary standard Na2C204 (133.999 g/mol) required 21.66 mL of KMN04…

A: Given: The mass of the primary standard is 0.2121 g. The molar mass of sodium oxalate is 133.999…

Q: In the titration of X(-) with AgN03, pX was 4.4 at the equivalence point (26.5 mL AGNO3). Calculate…

A: From the value of pX of AgNO3 , We are calculating Ksp for AgX as follows

Q: In titration of 50 ml 0.1 M Mn2+ with 0.01 M EDTA (pH = 7), what is pMn2+ when 100 ml EDTA is added?

A:

Q: Develop a titer for determining water hardness based on the following information: 6.240 mg/L Ca2+…

A: In a titration to determine the concentration of the metal ion, the EDTA combines quantitatively…

Q: The color change of a chemical indicator requires an over-titration of 0.03 mL. Calculate the…

A: Use the following formula to calculate the percent relative error:

Q: Find the concentration of the KMnO4.

A:

Q: (1) Design an EDTA masking titration that can find the concentration of Al 3+, Ca2+, and Fe3+.…

A: Generally, the EDTA (Ethylenediaminetetraacetic acid ) can form complexes with many metal ions like…

Q: What is the CORRECT expression of potential (versus SHE) at the equivalence point EEP) for the…

A:

Q: esign an EDTA masking titration that can find the concentration of Al 3+, Ca2+, and Fe3+. Explain…

A: EDTA is an unselective reagent forming complexes with  metal ions like Al3+ , Ca2+ , Fe3+ and…

Q: Express the titer of 0.120 M EDTA solution (MM 292.00) in mg CaO (MM 56.08) per A 3.15 mg/mL B) 6.73…

A: IMPORTANT POINTS: The language of the question is a little confusing  but  it simply says to…

Q: 3. A 100 mL sample of hard water is titrated with 22.4 mL of the EDTA solution from problem 2. The…

A: Given information :-  additional info: 1)25.95 mL of EDTA are needed to titrate the Ca2+ ion in the…

Q: One of the buffers that can be used for running an agarose gel is 1x TBE (tris borate EDTA) buffer.…

A: On dilution concentration changes but no of moles remain same. So, M1V1 = M2V2 M1: Concentration of…

Q: In titration of 100 ml 0.3 Mn²+ with 0.7 M EDTA (pH = 7), when 50 ml EDTA is added what is pMn²+?…

A:

Potentiometric Titrations

Potentiometric titration is one of the important titration methods and is mainly carried out to characterize acid solutions. It follows a method similar to that of the normal titration technique, but the main difference is that there is no indicator used in the potentiometric titrations. Instead of using an indicator, electrodes are employed for monitoring the whole titration process. A scientist named Robert Behrend did the potentiometric titration for the first time, and it was done using the mercurous solution and potassium chloride.