CHEM HELP!? Which of the following is true for STRONG acids?

Number 3 would be true. Most strong acids dissociate in water. How can you prove this and why is it true? If you took a strong acid such as HCl and mixed it with water you would find that the solution's conductivity greatly increases. What does this mean? A solution tends to have a higher conductivity when there's more ions present. HCl's bond is broke when mixed with water and H+ and Cl- ions are created. This is called dissociation.