What are the major components in water that make hard water hard ? Ca2+&Mg2+, No3-& Mg2+, Na+&Fe3+, Ca2+&Na+?

Q: 10. Some of the reported chemical concentrations of water at the pH 7.3 are the following: [Na"] =…

A: We will calculate the total hardness of water in mg/L  CaCO3 .

Q: The volume of 0.16M NaOH needed to react with 40 mL of 0.12M H2SO4 is     30 mL     40 mL…

A: Given Molarity of H2SO4 = 0.12 M Volume of H2SO4 = 40 ml = 0.04 L Molarity of NaOH = 0.16 M

Q: Given that the solubility of Cd3(PO4)2 is 1.2 x 10 mol/L what is its Ksp value? Note: the formula…

A:

Q: Rank these ions in order of increasing structuring (ordering, organizing) effect on water?    a.)…

A: We have to rank the following given ions in order of increasing structuring (ordering, organizing)…

Q: : Determine the lime and soda ash dose, in mg/L as CaO and Na2CO3, to soften the following water to…

A: Given , Final hardness = 80.00 mgmL Purity of lime = 94 % Purity of soda ash = 93 %

Q: Calculate the volume of 1 M CoCl2 needed to prepare 100 mL of 0.25 M CoCl2

A: Molarity of solution 2 (M2) = 0.25 Volume of solution 2 (V2) = 100 ml Molarity of solution 1 (M1)= 1…

Q: Assume that a water sample tested has 150 mg/L total hardness. The Mg hardness is 50 mg/L,Ca…

A: Total Hardness = Hardness due to Magnesium + Hardness due to Calcium OR Total Hardness = Temporary…

Q: A 134-mg sample of Na2CO3 is dissolved in H2O to give 1.45 L of solution. What is the concentration…

A: we have to calculate the concentration of Na+ in ppm  dioctyl phthalate in ppb

Q: Choose the substance that is classified correctly? O NaF is a basic salt in aqueous solution O AICI,…

A: When a salt anion is formed from a strong base and a weak acid, then the resulting salt is basic as…

Q: Give reasons why solid NaCl dissolves readily in water?

A: Solid NaCl dissolves readily in water has to be explained below.

Q: Calculate the molar concentrations of 10 mg/L (10.00 ppm) solutions of Hg2+. What weight of Hg(NO3)2…

A:

Q: A 104-mg sample of Na2CO3 is dissolved in H2O to give 2.45 L of solution. What is the concentration…

A:

Q: Describe what occurs during the dissociation of NaCl inwater. What occurs when glucose (C6H12O6 )…

A: Electrolytes dissociate into their constituent ions when they are dissolved in water. Electrolytes…

Q: A sample of sodium carbonate; Na,CO3 (MW=105.9 g/mole) weighing O.3125 g was dissolved in 40.0ml…

A: Given, The molar mass of Na2CO3 = 105.9 g/mol Mass of Na2CO3 = 0.3125 g Volume of Na2CO3 solution =…

Q: What is done to remove carbonates and bicarbonates salts of calcium and magnesium in water samples?…

A: Carbonate and bicarbonate salt of calcium and magnesium termed as temporary hardness. Temporary…

Q: Choose the substance that is classified correctly? O NaF is a basic salt in aqueous solution O FeBr3…

A: NaF is mixture of strong base and weak acid so resulting nature of salt is basic. In FeBr3 HBr is…

Q: How much CaCl2 would be required to make 50.0mL of a solution with 0.75 m Ca2+ ion? (use 1.00g/mL as…

A: Volume of solution = 50 mL Molality of solution = 0.75 molal or 0.75 m Molar mass of calcium…

Q: The Environmental Protection Agency recommends that Pb2+ have a concentration not exceeding 1.00 ×…

A:

Q: Apart from the identity of the central atom, what is the major difference between NH4+ and CH4? How…

A: Water is a polar solvent and it dissolves polar or ionic solutes. As the polarity of a solute or…

Q: Explain the processes of dissolution of Nacl

A: When NaCl (sodium chloride) is added to water (H2O), it dissolves and forms a solution. This process…

Q: The Henry's Law constant, KH, equals 0.035 M/atm for CO2 in water at 250C. If the partial pressure…

A: KH = 0.035 M/atm T = 25°C  PCO2 = 2.5 atm  [CO2] = ?  According to Henry's law, S = KH × P S is the…

Q: Materials Needed semi-micro test tubes and rack solid I2 regular test tubes and rack squash pipettes…

A: The rule odf solubility is 'like dissolves like' whuch means that polar solute will be dissolved in…

Q: Arrange the following solvents from the least to most solid Ca(OH)2 dissolved: ____ < ____ < ____ <…

A: We have to arrange the given solvents in order of least to most in which solid Ca(OH)2 dissolved.…

Q: 43.27 mL of 0.5033 M NaOH are required to neutralize 29.16 mL of a H2SO4 solution. What is the…

A: Given :-  H2SO4  +  2 NaOH  →  Na2SO4  +  2 H2O  Molarity of NaOH solution = 0.5033 M  Volume of…

Q: Most to least soluble ba2+ ca2+ mg2+ sr2+

A: In periodic table, as we descend the group second the radius of the ions gets bigger. Thus, for the…

Q: 1. What volume of water is needed to be mixed with 150 ml of alcohol to prepare a 25.0 % alcohol…

A: The answers to the following questions are given as:

Q: 43.27 mL of 0.5033 M NaOH are required to neutralize 29.16 mL of a H2SO4 solution. What is the…

A: Given reaction: H2SO4  +  2 NaOH  ------------------&gt;  Na2SO4  +  2 H2O Volume of H2SO4 =  29.16…

Q: The maximum permissible amount of cadmium (M=112 g/n) in drinking water is 0.01 mg/L. What is the…

A: Given that : The maximum permissible amount of cadmium in drinking water is 0.01 mg/L. We have to…

Q: Why doesn’t water dissociate to produce 10-7 M H+ and 10-7 M OH- when some HBr is added

A: Le Chatelier's principle, In any reaction, if a reaction at equilibrium is subjected to change in…

Q: How many grams of solid Cu2SO4 5H2O (249.68 g/mol) must be dissolved in 400 mL of water to obtain a…

A: Given :-  molarity of Cu+ ions = 0.0899 M  volume of water = 400 mL  molar mass of Cu2SO4 5H2O =…

Q: Phosphate that is added to our drinking water forms a protective layer of lead phosphate on the…

A: Solution: 1 ppb = 1 microgram / L So, 39 ppb lead = 39 microgram/L                           = 39 x…

Q: NaOH was standardized with 0.5 g potassium acid phthalate. At endpoint, 24.20 mL NaOH solution was…

A: Given:  Mass of potassium acid phthalate = 0.5 gm  Molar mass of potassium acid phthalate = 204.2…

Q: based on the conductivity results of pure distilled water, does water exist predominantly as ions or…

A: As per the conductivity results of pure distilled water, it does not conduct electricity.

Q: Moles of NaOH at the equivalence point? Mass of H2C2O4·2H2O= 1.32191 g Volume of the H2C2O4·2H2O…

A: In chemistry, there are many ways to check the deviation of experimental data from the accurate…

Q: alculate the mass of sodium citrate dihydrate, Na3C6H5O7(H2O)2, needed to prepare 50 mL of a 0.015 M…

A: 1. To calculate the mass of sodium citrate dihydrate, Na3C6H5O7(H2O)2, needed to prepare 50 mL of a…

Q: You have 97.0 mL of a 0.500 M stock solution of HCl that must be diluted to 0.200 M.  How much water…

A: A stock solution of 97.0 mL of a 0.500 M  solution of HCl that must be diluted to 0.200 M. We have…

Q: Why do Sedimentation and filtration is important in water treatment? Is a period of time important…

A: The sedimentation process is most important process which is imposed for the reduction of…

Q: In the wintertime, it is common to sprinkle salt (CaCl2) on icy roads and driveways.  Why does one…

A: When a solute (CaCl2) is added the freezing point of water undergoes depression. More the salt that…