Complete the following calculations and type your answers into the boxes.
In a volumetric flask, 4 g of NaCl is dissolved in of water.

Calculate the amount of NaCl dissolved in water.
mol of NaCl is dissolved in water.
2 Calculate the concentration of NaCl in the solution.
The solution has a NaCl concentration of

Ask by Weber Gray. in South Africa

Jan 24,2025

Question

Complete the following calculations and type your answers into the boxes.
In a volumetric flask, 4 g of NaCl is dissolved in of water.

Calculate the amount of NaCl dissolved in water.
mol of NaCl is dissolved in water.
2 Calculate the concentration of NaCl in the solution.
The solution has a NaCl concentration of

Ask by Weber Gray. in South Africa

Jan 24,2025

UpStudy AI · Accepted Answer

To calculate the amount of NaCl dissolved in water, we need to know the molar mass of NaCl. The molar mass of NaCl is 58.44 g/mol.

Given:
- Mass of NaCl = 4 g
- Volume of water = 0.5 dm³

1. Calculate the amount of NaCl dissolved in water:
$$ \text{Amount of NaCl} = \frac{\text{Mass of NaCl}}{\text{Molar mass of NaCl}} $$

2. Calculate the concentration of NaCl in the solution:
$$ \text{Concentration of NaCl} = \frac{\text{Amount of NaCl}}{\text{Volume of solution}} $$

Let's calculate the amount of NaCl dissolved in water and the concentration of NaCl in the solution.
Calculate the value by following steps:
- step0: Calculate:
  $$\frac{4}{58.44}$$
- step1: Convert the expressions:
  $$\frac{4}{\frac{1461}{25}}$$
- step2: Multiply by the reciprocal:
  $$4\times \frac{25}{1461}$$
- step3: Multiply:
  $$\frac{4\times 25}{1461}$$
- step4: Multiply:
  $$\frac{100}{1461}$$
The amount of NaCl dissolved in water is approximately 0.068 mol.

Now, let's calculate the concentration of NaCl in the solution.
Calculate the value by following steps:
- step0: Calculate:
  $$\frac{0.068}{0.5}$$
- step1: Convert the expressions:
  $$\frac{\frac{17}{250}}{\frac{1}{2}}$$
- step2: Multiply by the reciprocal:
  $$\frac{17}{250}\times 2$$
- step3: Reduce the numbers:
  $$\frac{17}{125}\times 1$$
- step4: Multiply:
  $$\frac{17}{125}$$
The concentration of NaCl in the solution is 0.136 mol/dm³.
0.068 mol of NaCl is dissolved in water, and the concentration of NaCl in the solution is 0.136 mol/dm³.

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