a solution was made by dissolving 8.2g of calcium nitrate to give 2 litres os solution. determine the concentration of nitrate ions in moles per litre
Question
a solution was made by dissolving 8.2g of calcium nitrate to give 2 litres os solution. determine the concentration of nitrate ions in moles per litre
Solution
Sure, here are the steps to determine the concentration of nitrate ions in moles per litre:
-
First, we need to calculate the molar mass of calcium nitrate (Ca(NO3)2). The molar mass of calcium (Ca) is approximately 40.08 g/mol, nitrogen (N) is approximately 14.01 g/mol, and oxygen (O) is approximately 16.00 g/mol. Since there are two nitrogen atoms and six oxygen atoms in calcium nitrate, the molar mass of calcium nitrate is 40.08 g/mol + 2(14.01 g/mol) + 6(16.00 g/mol) = 164.10 g/mol.
-
Next, we calculate the number of moles of calcium nitrate in the 8.2g of the substance. The number of moles is given by the mass of the substance divided by its molar mass. So, the number of moles of calcium nitrate is 8.2g / 164.10 g/mol = 0.05 mol.
-
Since each unit of Ca(NO3)2 yields two nitrate ions (NO3-), the number of moles of nitrate ions is 2 * 0.05 mol = 0.1 mol.
-
Finally, we calculate the concentration of nitrate ions in the solution. The concentration is given by the number of moles of the substance divided by the volume of the solution in litres. So, the concentration of nitrate ions is 0.1 mol / 2 L = 0.05 mol/L.
Similar Questions
A sample containing 0.010 mol of anhydrous calcium nitrate is heated strongly until it fullydecomposes.All the gas produced is collected and its volume measured at room conditions.What is the volume of gas produced?
Two solutions were mixed together. One solution was 300 mL of 0.45 M sodium chloride. The other solution was 200 mL of 1.5 M sodium nitride. What was the final concentration of sodium ions in the solution? Question 4 options: 1.95 M 0.435 M 2.07 M 0.975 M 0.87 M
You have a solution of silver nitrate with an unknown concentration. To determine the concentration, you devise a method of adding an excess of calcium metal to 100.0 cm3 of solution and collecting the silver by filtration.2AgNO3(aq)+Ca(s)→Ca(NO3)2(aq)+2Ag(s)2AgNO3(aq)+Ca(s)→Ca(NO3)2(aq)+2Ag(s)If 0.201 g of silver was collected, calculate the concentration of the silver nitrate solution in mol dm−3.Answer with the numerical value of the concentration to three significant figures, but do not include the units.
8.2 grams of calcium nitrate is decomposed by heating according to the equation2Ca (NO3 )2 _____ 2CaO +4NO2 + O2Calculate the following:(a) Volume of nitrogen dioxide obtained at STP(b) Mass of CaO formed[Atomic weights: Ca –40 , N—14, O—16][4]
You need 250.0 mL of a 0.0774 M solution of sodium nitrate to use in the laboratory. What volume of a 0.278 M stock solution would you need to dilute to achieve this concentration?Question 8Answer25.0 mL69.6 mL5.4 mL11618.6 mL10.0 mL
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.