1. The problem statement, all variables and given/known data Consider the circuit shown in the figure below, where C1 = 4.00 µF, C2 = 7.00 µF, and ΔV = 22.0 V. Capacitor C1 is first charged by closing switch S1. Switch S1 is then opened, and the charged capacitor is connected to the uncharged capacitor by closing S2. (a) Calculate the initial charge acquired by C1. (b) Calculate the final charge on each capacitor. 2. Relevant equations Q=CV 3. The attempt at a solution The answer to (a) was easy, though I'm not 100% sure my reasoning is accurate. My reasoning was that voltage across parallel devices is equal, so I just plugged in the voltage on the left device into Q=CV. I don't really understand (b) though. The solution says "When S1 is opened and S2 is closed, the total charge will remain constant and be shared by the two capacitors." I'm assuming if something opens then it cuts off the connection and if it closes then it creates the connection. I still don't get it though. There must be some concept I'm missing.