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What is the molarity of a solution prepared by dissolving 4.92 g of calcium nitrate Ca(NO3)2 in 250 mL of water?
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What is the molarity of a solution with 0.207 mol of calcium acetate dissolved in a total volume of 166.5mL?
Molarity = moles solute/liters solution = 0.207 moles/0.1665 L = 1.24 molar (3 sig. figs.)
If dissolving calcium chloride in water is spontaneous what is the sign?
If dissolving calcium chloride in water is spontaneous, the sign of ΔG (Gibbs free energy) is negative.
How is lime water prepared?
1 lime 1 tsp sugar Water Ice cubes Measure the sugar, and dissolve in 1tsp boiling water. Pour into a glass. Add the lime, and fill up the rest of the glass with water, and drop in the ice cubes, but they are not really needed.
Why calcium is obtained by electrolysis of molten calcium chloride rather than its solution?
if done in water solution, the extracted calcium would immediately react with the water to form calcium hydroxide.
Are there dangerous byproducts from electrolysis on a solution of calcium chloride and water?
Electrolysis of calcium chloride solution release chlorine.
What is the Molarity of a solution made from dissolving 53.6grams of calcium carbonate in 0.94 liters of water?
It doesn't exist - calcium carbonate is limestone/marble - its insoluble
What best shows that calcium is different from all other elements?
Its numbers of protrons
What is the OH- of a 4.0 x 10-4 M solution of CaOH2?
The concentration of the OH- is 8.0 x 10-4 In terms of molarity, since the hydroxide is double that of the calcium, double the molarity of the solution.
Why ammonium oxalate is added in calcium carbonte solution?
ammonium oxalate is added to calcium carbonate because in the reaction between the two a crystal is formed that contain the Ca+2 ion. This is useful because if you have a sample of sodium carbonate with an unknown molarity you can use the oxalate to extract this calcium and determine what the molarity of the unknown solution was
What is the molarity of a solution with 0.207 mol of calcium acetate dissolved in a total volume of 166.5mL?
Molarity = moles solute/liters solution = 0.207 moles/0.1665 L = 1.24 molar (3 sig. figs.)
What is the molarity of the solution obtained by diluting 12.500 mL of a 5.42 M calcium bromide solution to 500.0 mL?
For problems like these, (dilution/concentration) it is usually best to find out how many moles of solute you are working with. To do this, multiply the number of Liters you have by the Molarity (mol/L) of the solution:(.0125L)*(5.42M)= .0678mol (12.5mL=.0125L because there are 1000mL in 1L)Now that we know how many moles of calcium bromide we have, we can find the molarity of the new solution if it is .5L. Because molarity is just mol/L, we can just divide the amount of moles by .5, which gets us:(.0678mol)/(0.5L)= 0.136M
What is the Molarity of a 657.5 mL solution that contains 41.3 g of calcium carbonate (CaCO3)?
Upon doing some simple calculations the answer is 2.4 M
If dissolving calcium chloride in water is spontaneous what is the sign?
If dissolving calcium chloride in water is spontaneous, the sign of ΔG (Gibbs free energy) is negative.
How does the formation of stalactite related to the action of acids on calcium carbonate?
The acid is Carbonic Acid, formed by Carbon Dioxide from the atmosphere dissolving into rain-water, and though very weak capable of dissolving limestone whose main constituent is calcium Carbonate. The stalactites are of calcite, crystallised calcium carbonate precipitated from that solution.
If a saturated solution of calcium hydroxide had a molarity of 0.0125M what is the concentration of Ca and OH?
The formula for calcium hydroxide is Ca(OH)2. This means for every calcium hydroxide, you have 2 hydroxides. 0.0125M Ca(OH)2 is 0.025M (OH)-.
How is limewater formed?
Lime water is a solution of sodium hydroxide. Lime water is formed by dissolving calcium oxide, CaO or quicklime in water.
How is lime water prepared?
1 lime 1 tsp sugar Water Ice cubes Measure the sugar, and dissolve in 1tsp boiling water. Pour into a glass. Add the lime, and fill up the rest of the glass with water, and drop in the ice cubes, but they are not really needed.
