Explain how to calculate preparing 250.0ml of 1.25 mol/L solution of Na2CO3(aq)
To calculate the amount of Na2CO3 needed to prepare 250.0 mL of a 1.25 mol/L solution, you need to use the formula:
Amount of Na2CO3 (in moles) = Volume of Solution (in liters) x Concentration of Solution (in mol/L)
Step 1: Convert the given volume from milliliters (mL) to liters (L).
250.0 mL ÷ 1000 = 0.250 L
Step 2: Multiply the converted volume by the desired concentration.
0.250 L x 1.25 mol/L = 0.3125 moles of Na2CO3
Therefore, to prepare 250.0 mL of a 1.25 mol/L solution of Na2CO3, you would need 0.3125 moles of Na2CO3.