Question

In: Chemistry

Suppose the mole number of Ca2+ ions in a 50 mL water sample is quantified as...

Suppose the mole number of Ca2+ ions in a 50 mL water sample is quantified as 1.5 × 10−5 mol. What is the concentration of Ca2+ ions in the water sample in ppm CaCO3?

Solutions

Expert Solution


Related Solutions

Which would be the best emulsifier of soil if soft water (no Ca2+ ions, Mg2+ ions,...
Which would be the best emulsifier of soil if soft water (no Ca2+ ions, Mg2+ ions, and so on) were used? a. A soap. b. A detergent. c. Both would be about the same. Explain your answer: ________________________________
Hard water often contains dissolved Ca2+ and Mg2+ ions. One way to soften water is to...
Hard water often contains dissolved Ca2+ and Mg2+ ions. One way to soften water is to add phosphates. The phosphate ion forms insoluble precipitates with calcium and magnesium ions, removing them from solution. Suppose that a solution is 0.049 M in calcium chloride and 0.094 M in magnesium nitrate. What mass of sodium phosphate would have to be added to 1.4 L of this solution to completely eliminate the hard water ions? Assume complete reaction. Enter a numerical answer in...
1. Which of the following ions will react with water in a hydrolysis reaction: Na+, Ca2+,...
1. Which of the following ions will react with water in a hydrolysis reaction: Na+, Ca2+, Cu2+, Zn2+, F-, SO32-, Br- 2. For those ions in question 1 that undergo hydrolysis, write net ionic equations for the hydrolysis reaction(s). 3. The Ka for HCN is 4.9x10-10. What is the value of Kb for CN-? Write the 2 equilibrium expressions and chemical equations. 4. What are the conjugate base and conjugate acid of H2PO4-? Look up the different Ka values for...
A 0.6025 g sample was dissolved, and the Ca2+ and Ba2+ ions present were precipitated as...
A 0.6025 g sample was dissolved, and the Ca2+ and Ba2+ ions present were precipitated as BaC2O4·H2O and CaC2O4·H2O. The oxalates were then heated in a thermogravimetric apparatus leaving a residue that weighed 0.5713 g in the 320o-400oC range and 0.4673 g in the 580o-620oC range. Calculate the percentages of Ca and Ba in the original sample.
Water softeners remove metal ions such as Ca2+ and Fe3+ by replacing them with enough Na+...
Water softeners remove metal ions such as Ca2+ and Fe3+ by replacing them with enough Na+ ions to maintain the same number of positive charges in the solution. If 5.5*103 L of hard water is 0.015 M Ca2+ and 0.0010 M of Fe3+ , how many moles of Na+ are needed to replace these ions?
A surface water sample of 50 ml was taken to determine the concentration of an organic...
A surface water sample of 50 ml was taken to determine the concentration of an organic pollutant in the sample. An organic solvent was used as extracting solvent. On analysis of both phases by GC-MS, the pollutant concentration (mass/vol based) in the organic phase was 5 times that found in the aqueous phase. If after the second extraction (each using 50ml fresh organic solvent) the concentration of pollutant in the organic phase was 18 ppm (mass basis), determine the initial...
Suppose that 0.323 g of an unknown sulfate salt is dissolved in 50 mL of water....
Suppose that 0.323 g of an unknown sulfate salt is dissolved in 50 mL of water. The solution is acidified with 6M HCl, heated, and an excess of aqueous BaCl2 is slowly added to the mixture resulting in the formation of a white precipitate. 1. Assuming that 0.433 g of precipitate is recovered calculate the percent by mass of SO4 (2-) in the unknown salt. 2. If it is assumed that the salt is an alkali sulfate determine the identity...
A. Approximate Molarity of Calcium Ions (Ca2+ (aq)) in Tap Water is 2.99 x 10^-3 M....
A. Approximate Molarity of Calcium Ions (Ca2+ (aq)) in Tap Water is 2.99 x 10^-3 M. 1-  How many moles of Calcium Ions are present in 25 mL? 2- How many grams of calcium ions are present in 25 mL? B. Approximate ppm of Calcium Ions (Ca2+ (aq)) in Tap Water is 120 ppm. 1- How many grams of Calcium Ions are present In 1,000,000 mL based on the concentration determined in ppm? 2- How many grams of Calcium Ions are...
A 50 mL sample of water has an initial pH of 11.2. Determine the total alkalinity...
A 50 mL sample of water has an initial pH of 11.2. Determine the total alkalinity and the different species of alkalinity if the equivalence point is reached at 8 mL of 0.01 N H2SO4 and 4.5 equivalence point is reached at 18 mL of 0.01 N H2SO4. (10 points
A solution contains 0.600 g of Ca2 in enough water to make a 1875 mL solution....
A solution contains 0.600 g of Ca2 in enough water to make a 1875 mL solution. What is the milliequivalents of Ca2 per liter (mEq/L) for this solution?
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT