A mix contain 76.5% NaCl , 6.5% MgCl2 , and 17.0% Na2S04 by mass. What is morality of Cl- ions in a soltn?

Question

A mixture of contain 76.5% NaCl , 6.5% MgCl2 , and 17.0% Na2S04 by mass. What is morality of Cl- ions in a solution formed by dissolving 7.50g of mixture in enough water to form 500.0ml of solution

Answer 1

In each 1 gram of the solid mixture, you have 0.765 grams NaCl and 0.065 grams of MgCl2.

Divide each of those masses by the molar mass of the compound to give you the moles of each compound/gram of the mixture. Multiply those numbers of moles by 7.5 to give you the number of moles of each compound in 7.5 grams of the mixture.

Each mole of NaCl produces 1 chloride ion, but each mole of CaCl2 gives 2 moles of chloride ions, so multiply the moles of CaCl2 by 2. Add the moles of chloride ions from NaCl + moles of chloride from CaCl2 to get the total moles of chloride ions.

Finally, divide that number of moles by 0.5 L to give you the final molarity.

Answer 2

previous the line the shrink consists of the provision of stepped forward existence help and for regulation enforcement to supervise crash web pages. seventy 5 mph is plenty greater survivable than 80 mph, which in turn is plenty greater survivable than 80 5 mph. At one hundred mph only approximately all injuries are fatalities, which (from a regulatory point of view) can tie up officers and close down the line for 0.5 an afternoon. At one hundred twenty mph, see the video interior the 1st source. autos could desire to be designed for a optimal impression velocity, the fee at which the cave in zones are exhausted and the restraints have performed all they could. interior the Seventies it replaced into regularly occurring the "candy spot" for optimal impression velocity for passenger autos replaced into approximately 80 mph. by potential of that velocity fatalities are ordinary besides so it did not count if the vehicles have been designed for ninety mph. velocity limits mirror the jurisdiction's willingness to deal with the carnage from greater speeds. 70 mph is tremendously secure, 80 mph is soliciting for hardship. ninety mph is only ordinary stupid.