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To prepare a 100 ppm fluoride standard from sodium fluoride, you would dissolve an appropriate amount of sodium fluoride in a known volume of water. For example, to make 1 liter of 100 ppm fluoride solution, you would dissolve 0.1 grams of sodium fluoride in 1 liter of water.

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Preparation of 0 38 M sodium acetate solution?

To prepare a 0.38 M sodium acetate solution, you would need to dissolve the appropriate amount of sodium acetate trihydrate (CH₃COONa·3H₂O) in water. For example, to make 100 mL of a 0.38 M solution, you would dissolve 2.96 grams of sodium acetate trihydrate in sufficient water to make 100 mL. Ensure complete dissolution before use.


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What is the mass percent of a sodium fluoride solution prepared by dissolving 0.64 moles of sodium fluoride into 63.5 grams of water?

To find the mass percent of sodium fluoride in the solution, we first need to calculate the total mass of the solution. The molar mass of sodium fluoride (NaF) is 41.99 g/mol. Mass percent = (mass of NaF / total mass of solution) x 100% Mass of NaF = 0.64 moles x 41.99 g/mol = 25.56 grams Total mass of solution = 25.56 g (NaF) + 63.5 g (water) = 89.06 g Mass percent = (25.56 g / 89.06 g) x 100% ≈ 28.7%


How do you prepare standard 0.1 N 100 ml Na2CO3 solution?

To prepare a 0.1 N 100 ml Na2CO3 solution, dissolve 5.3 grams of Na2CO3 in water and dilute to 100 ml. This will give you a solution with a concentration of 0.1 normal (N) for the 100 ml volume.


How do you prepare a 12 percent NaCl solution?

Dissolve 12 g dried sodium chloride (reagent grade) in 100 mL demineralized water.


How do make 10 percent sodium thiosulfate solution?

To get 100g of solution: 10g of sodium thiosulfate + 90g of water.


How much is sodium per 100 grams?

Sodium content in sodium is approximately 393 mg per 100 grams.