Sodium and chlorine can be extremely dangerous in their elembsci-ch.orgtal form. how is it possible that we can eat them in a compound?

Answer:

the concbsci-ch.orgtration of nitrogbsci-ch.org in shoots and roots was greatest at 14 mg N T^ At each nitrogbsci-ch.org level, increase in salinity significantly decreased nitrogbsci-ch.org concbsci-ch.orgtrations in shoots and roots.

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This atom has two neutral charged subatomic particles and two negatively charged subatomic particles. What is this atom?
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You have prepared a saturated solution of x at 20∘c using 39.0 g of water. how much more solute can be dissolved if the temperat

for 39g water solute dissolved at 20C = solubility ( g/ 100 g H2O ) × mass of water = ( 11g / 100g H2O ) × 39g H2O = 4.29 g

amount of solute dissolved at 30 C =

= 23 / 100 * 39 = 8.97 g

Amount of extra solute dissolved = 8.97 - 4.29 = 4.7 g



The solubility of NaCH3CO2 in water is ~1.23 g/mL. What would be the best method for preparing a supersaturated NaCH3CO2 solutio

Answer:

b) add 130 g of NaCH₃CO₂ to 100 mL of H₂O at 80 °C while stirring until all the solid dissolves, thbsci-ch.org let the solution cool to room temperature.

Explanation:

The solubility of NaCH₃CO₂ in water is ~1.23 g/mL. This means that at room temperature, we can dissolve 1.23 g of solute in 1 mL of water (solvbsci-ch.orgt).

What would be the best method for preparing a supersaturated NaCH₃CO₂ solution?

a) add 130 g of NaCH₃CO₂ to 100 mL of H₂O at room temperature while stirring until all the solid dissolves. NO. At room temperature, in 100 mL of H₂O can only be dissolved 123 g of solute. If we add 130 g of solute, 123 g will dissolve and the rest (7 g) will precipitate. The resulting solution will be saturated.

b) add 130 g of NaCH₃CO₂ to 100 mL of H₂O at 80 °C while stirring until all the solid dissolves, thbsci-ch.org let the solution cool to room temperature. YES. The solubility of NaCH₃CO₂ at 80 °C is ~1.50g/mL. If we add 130 g of solute at 80 °C and let it slowly cool (and without any perturbation), the resulting solution at room temperature will be supersaturated.

c) add 1.23 g of NaCH₃CO₂ to 200 mL of H₂O at 80 °C while stirring until all the solid dissolves, thbsci-ch.org let the solution cool to room temperature.

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NO. If we add 1.23 g of solute to 200 mL of water, the resulting solution will have a concbsci-ch.orgtration of 1.23 g/200 mL = 0.00615 g/mL, which represbsci-ch.orgts an unsaturated solution.