If your pCO2 is 35 and your pH is 7.35 what would happen if you increase your respiratory rate?

If you are healthy nothing should happen because your body will make the necessary adjustments by increasing the sodium bicarbonate level to keep the pH level normal. If you are sick and you increase your resp rate and your body can't adjust then the pH will go down along with the cO2 level.

This is true if the body is given enough time to adjust. However, it takes the renal system 24 - 48 hours to adjust to changes in the CO2 levels. In the short run, if you increase respiratory rate, the CO2 level will decrease and the pH will increase. This can lead to a respiratory alkalosis.