Scarlett wants to make a buffered solution to clean the marker that Ada has generously donated to the wall in her bedroom. She needs to make an ideal buffer that has a basic pH. With her extensive chemistry experience, she knows she can use sodium carbonate (Na2CO3) and 1.0 M HCl to make the buffer she wants. Sodium carbonate is a dibasic base. The pKb of ,)# *M is 3.68 and the pKb of ",)# M is 7.65. The pKa of HCl is -10. **Hint** dibasic bases can make more than one ideal buffer If Scarlett needs 4 L of buffer with a total concentration of [CO3] = 0.25 M and a basic pH, calculate the gram amount of Na2CO3, volume of 1.0 M HCl and any additional water needed to create the buffer.