if 30 ml of 0.50 m oh- is added to 200 mls of a 1.5 m buffer (ph 7.4), what is the resulting ph in the buffer? the pka of the buffer is 8.

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?