Question

Сколько граммов и молей натрия можно растворить в 380г воды?

Answer 1

2Na+2H2O=2NaOH+H2
n(H2O)=m(H2O)/M(H2O)=380 г/18 г/моль=21,1 моль
n(Na)=n(H2O)
m(Na)=n(Na)*M(Na)=21,1 моль*23 г/моль=485,3 г.
Ответ:в 380 г воды можно растворить 485,3 г или 21,1 моль натрия

Answer 2

Calculating Sodium Dissolved in Water

To calculate the amount of sodium that can be dissolved in 380g of water, we need to consider the solubility of sodium in water. The solubility of sodium in water is approximately 7 grams per 100 grams of water.

Calculation

The calculation can be done as follows:

Step 1: Calculate the amount of sodium that can be dissolved in 380g of water using the solubility value. Step 2: Convert the result to moles for a more precise measurement.

Step 1: Calculating Sodium Dissolved in 380g of Water

Using the solubility value of sodium in water (7 grams per 100 grams of water) - 380g of water can dissolve approximately 7 * (380/100) = 26.6g of sodium.

Step 2: Converting to Moles

To convert the mass of sodium to moles, we can use the molar mass of sodium, which is approximately 22.99 g/mol. - Moles of sodium = Mass of sodium / Molar mass of sodium - Moles of sodium = 26.6g / 22.99g/mol ≈ 1.16 moles of sodium

Therefore, approximately 26.6 grams of sodium can be dissolved in 380g of water, which is approximately 1.16 moles of sodium.