Both Ti and V are reactive enough to displace H₂ from water. The difference in their EΔ°half-cell values is 0.43 V. GivenV(s) + Cu²⁺(aq) → V²⁺(aq) + Cu(s) ΔG°=-298kJ/moluse Appendix D to calculate the E°half-cell values for V and Ti.