Please calculate how many grams of sodium chloride is needed to prepare a solution of a given concentration and volume, and also the volume of solution needed to prepare a second s... Please calculate how many grams of sodium chloride is needed to prepare a solution of a given concentration and volume, and also the volume of solution needed to prepare a second solution with a specific concentration.
Understand the Problem
The question involves calculating the amount of sodium chloride needed to prepare solutions with specific concentrations and volumes while using the provided density data. This requires applying formulas related to concentration, mass, and volume.
Answer
To find grams of sodium chloride needed, use $m_{NaCl} = \frac{\omega \times V_{sol1} \times \rho_{sol1}}{100}$.
Answer for screen readers
To calculate grams of sodium chloride needed, apply the formula for each student based on their respective data from the table. The final results for each student's number will give you the grams required.
Steps to Solve
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Identify Key Data Locate the necessary data for sodium chloride concentration ($\omega_{sol} %$), volume ($V_{sol1}$), and density ($\rho_{sol1,\text{g/ml}}$) from the provided table for each student’s assignment.
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Calculate Mass of Sodium Chloride for Solution 1 Use the formula for calculating mass: $$ m_{NaCl} = \frac{\omega , \text{(in %)} \times V_{sol1} , \text{(in ml)} \times \rho_{sol1} , \text{(g/ml)}}{100} $$ Substituting the values from the chosen student’s row into the equation to find grams needed.
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Repeat for Each Student Assignment Each student must perform the calculation using their specific data from the table under columns $V_{sol1}$, $\omega_{sol1}$, and $\rho_{sol1}$.
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Verify Units Ensure that all units are consistent, particularly that volumes are in ml and masses are in grams for the formula to be valid.
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Prepare Final Results Once all calculations are complete for each student based on their assigned number, record the results accordingly.
To calculate grams of sodium chloride needed, apply the formula for each student based on their respective data from the table. The final results for each student's number will give you the grams required.
More Information
The density values indicate how many grams of sodium chloride are present in a certain volume of the solution. Understanding these relationships and calculations helps in various fields, including chemistry and pharmacology, where precise concentrations are crucial for experiment results and formulations.
Tips
- Mixing up the density and volume units.
- Forgetting to convert the percentage concentration to a decimal when performing calculations.
- Incorrectly adding or interpreting the data for each student, leading to inaccurate mass calculations.
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