Whenever I see a TV show that mentions Venus, I think about how one might terraform Venus; this quite often, because I like that type of show. Rotation speed increase is probably not best solved by bombardment of some extra planetary body. Instead, some gravitational coupling with a large asteroid that would serve as Venus’ moon would probably be the way to reverse Venus’ very slow retrograde rotation and then speed the rotation up in the prograde direction. We would need to develop the technology to gently park a large asteroid in orbit and adjust the speed of the asteroid so that it has the desired effect on Venus. With regard whether there is water in sulfuric acid. Yes; Sulfuric Acid (H2SO4) has all of the components for water (H2O). I am sure that some chemical engineer could find a way to break down sulfuric acid (on a planetary scale) into water, sulfur, and oxygen. But, if it is a mechanical system, it would be a very great technical challenge to keep the machinery from breaking down under the Venus’ very high temperatures and pressure. Perhaps, when we get better at genetic engineering, we will be able to genetically engineer some extremophile bacteria that, thrives and flourishes in the very hot high pressure Venusian atmosphere, eats sulfuric acid, excretes pure sulfur or some sulfur compound, and releases water or oxygen. However, most scientists are much more interested in the easier problem of terraforming Mars. This makes me believe that what you and I are thinking about is probably more than a thousand years ahead of its time. But don't stop; your kind of thinking is good.