Can Humidifier affect soil's PH????????

I'm just starting with my new grow and i came up with this question that never came in my mind before!
I always grow in soil and water my pots with distilled water!!! My plants just popped out of the ground...
I also use a humidifier to keep humidity levels high during this vegetative stage. I filled the container of the humidifier twice until now with tap water and i have noticed white powder on it.( around the mist exhaust of the humidifier). I understand that this is salts. So i instantly switched to distilled water for my humidifier too.... My question is .... Could the soil's PH around the humidifier be affected by these two times i used tap water and have problems in the near future or not????????

So many questions. I can't cope.

Could the soil's PH around the humidifier be affected by tap water(using in the humidifier) or not????????