Water softeners often replace calcium ions in hard water with sodium ions. Since sodium compounds are soluble, the presence of sodium ions in water does not cause the white, scaly residues caused by calcium ions. However, calcium is more beneficial to human health than sodium because calcium is a necessary part of the human diet, while high levels of sodium intake are linked to increases in blood pressure. The U.S. Food and Drug Administration (FDA) recommends that adults ingest less than 2.4 g of sodium per day.

How many liters of softened water, containing a sodium concentration of 5.6×10^−2% sodium by mass, have to be consumed to exceed the FDA recommendation? (Assume a water density of 1.0 g/mL)

  1. 👍
  2. 👎
  3. 👁
  1. it is worth noting that 5.6x10^-2% w/w is the same as w/v as the density=1.0 g/ml

    so 5.6x10^-2 g/100g is the same as

    5.6 x 10^-4 g/g or

    5.6 x 10^-4 g/ml

    so to injest 2.4 g then

    2.4 g / (5.6 x 10^-4 g/ml)


    then convert to litres.

    1. 👍
    2. 👎
  2. 5L

    1. 👍
    2. 👎
  3. Please don't listen to the one above me.

    it is 4.28571 L

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    Which argument supports the claim that dissolving solid calcium chloride (CaCl2) in water is a chemical change? A. The ionic bond between the calcium ions and chloride ions is broken. B. The solid calcium chloride can be recovered

  2. Chemistry

    How does table salt (NaCl) dissolve in water? A. The oxygen atoms in water molecules attract sodium ions. B. Each sodium ion is surrounded by chloride ions. C. Each NaCl molecule is surrounded by water molecules. D. Water

  3. Science

    Ionic compounds dissolve in water, and their ions separate from each other. If a sample of Al2S3 containing 16 aluminum ions is dissolved in water, how many sulfide ions will be present? So, two cations and three anions. Would we

  4. Physics

    In solid sodium chloride (table salt), chloride ions have one more electron than they have protons, and sodium ions have one more proton than they have electrons. These ions are separated at about 0.28 nm. Calculate the

  1. Chemistry

    When sodium chloride, NaCl, is added to water, it forms a solution. Rank the steps involved in the dissolution of salt in water from first step to last step. To rank items as equivalent, overlap them. a.) NaCl crystal is added to

  2. Chemistry

    Pure water and Sodium chloride are both poor conductors of electricity by themselves. However, if sodium chloride crystals are dissolved into the water the solution becomes a good conductor of electricity. How does this phenomenon

  3. chem

    A 4.55L sample of water contains .115g of sodium ions. Determine the concentration of sodium ions in ppm if the density of the solutions is 1.00g/mL. Ok so ppm=mass of solute/mass of solution *10^-6 so we have the mass of the

  4. Chemistry

    Is it true that Na+ and K+ are always spectator ions in reactions that involve sodium and potassium compounds

  1. Chemistry

    In the reaction between aqueous solutions of lead(II) chlorate and sodium iodide, which ions become spectator ions? a) Pb2+ b) ClO3- c) Na+ d) I-

  2. chemistry

    If you have 25.3 g of NaCl. a) how many moles of NaCl do you have? = .433 mol b) how many moles of sodium ions do you have? c)how many moles of chloride ions do you have? d) how many sodium ions do you have? e) how many chloride

  3. Chemistry

    The Concentration of Cu2+ ions in the water (which also contains sulfate ions) discharged from a certain industrial plant is determined by adding excess sodium sulfide(Na2S) solution to .800 L of the water. Molecular Equation:

  4. Integrated Science

    What do positive hydrogen ions produce when they react with water in solution? A).hydroxide ions B).hydronium ions C).a salt D).negative hydrogen ions I believe the answer is A). Is this correct?

You can view more similar questions or ask a new question.