Need help dosing my viagra powder

Hey bros,
I have 1g of sildenafil citrate aka viagra powder. I can drive 2 hours to a friends who has a scale who could weigh out 50mg or 100mg amounts to put in caps but to save me the trip could I dilute the 1g of viagra in a given volume of water and dose accordingly.

First off is viagra water soluble?

Could I say place the 1g in 10ml of water making ever ml 100mg?

I know doing it that way would be slightly off doseage wise since adding chemicals changes the volume, but would it work even though it is not that accurate?

What do you suggest?

Any info is greatly appreciated, thanks,,,bigjosh

Bump for harvey, water? Would it suspend it enough? Everclear? I've read of people using everclear for cialis.

How much alcohol would one suggest adding? Also is that really necessary...? I can't see some viagra powder in water getting too full of bacteria and even if it did taking orally most stuff won't hurt you.... anyone have any thoughts on this?