(Solved): 3. What is a buffer? A. pH Colors Using Red Cabbage Indicator Questions and Problems Q.1 Complete ...

3. What is a buffer? A. $\mathrm{pH}$ Colors Using Red Cabbage Indicator Questions and Problems Q.1 Complete the following table: Q2. The label on the shampoo claims that it is $\mathrm{pH}$ balanced. What do you think "pH balanced" means? Q3 A solution has a $[\mathrm{OH}]=1\times 10^{-5}\mathrm{M}$. What are the $\left[{\mathrm{H}}_3{\mathrm{O}}^{+}\right]$and the pH of the solution? Q.4 A sample of 0.0020 mole of $\mathrm{HCl}$ is dissolved in water to make a 2000 -mL, solution. Calculate the molarity of the $\mathrm{HCl}$ solution, the $\left[{\mathrm{H}}_2{\mathrm{O}}^{+}\right]$, and the $\mathrm{pH}$. For a strong acid such as $\mathrm{HCl}$, the $\left[{\mathrm{H}}_3{\mathrm{O}}^{+}\right]$is the same as the molarity of the $\mathrm{HCl}$ solution. $\mathrm{HCl}+{\mathrm{H}}_2\mathrm{O}⟶{\mathrm{H}}_3{\mathrm{O}}^{\ast }+{\mathrm{Cl}}^{-}$