A 2.0% (m/v) NaCI solution contains
Express your answer using two significant figures.
g NaCI in 300. mL of solution.
To find the mass of NaCl in the solution, we can use the mass/volume percent formula:
Mass (g) = (mass/volume percent) x volume (mL) / 100
Given:
Mass/volume percent = 2.0% (m/v)
Volume = 300 mL
Substituting the values into the formula:
Mass (g) = (2.0% x 300 mL) / 100
Mass (g) = (2.0 / 100) x 300
Mass (g) = 6 g
Therefore, there are 6 grams of NaCl in 300 mL of a 2.0% (m/v) NaCl solution.
To find the amount of NaCl in the solution, we need to convert the percentage concentration into grams and then multiply by the volume of the solution.
The percentage concentration is given as 2.0% (m/v), which means 2.0 grams of NaCl is present in 100 mL of solution.
To find the grams of NaCl in 300 mL of solution, we can use a proportion:
2 g NaCl /100 mL = x g NaCl /300 mL
Cross-multiplying, we have:
100 mL * x g NaCl = 2 g NaCl * 300 mL
x g NaCl = (2 g NaCl * 300 mL) / 100 mL
x g NaCl = 6 g NaCl
Therefore, there are 6 grams of NaCl in 300 mL of the 2.0% NaCl solution.
To find the number of grams of NaCl in a 2.0% (m/v) NaCl solution, you will need to follow these steps:
Step 1: Convert the percentage into a decimal
To convert 2.0% into a decimal, divide it by 100.
2.0% = 2.0/100 = 0.02
Step 2: Multiply the decimal by the volume of the solution (in liters)
Since the volume of the solution is given in milliliters (mL), you will need to convert it to liters by dividing by 1000.
300 mL = 300/1000 = 0.3 L
Step 3: Multiply the decimal by the volume to find the grams of NaCl
Multiply the decimal obtained in step 1 by the volume obtained in step 2.
0.02 x 0.3 = 0.006 grams
Thus, a 2.0% (m/v) NaCl solution contains 0.006 grams of NaCl in 300 mL of solution. When expressing the answer with two significant figures, it is rounded to 0.006 grams.