Each row of the table below describes an aqueous solution at 25 °C. The second column of the table shows the initial components of the solution. • Use the checkboxes in the third column to explain the type of the initial solution. The fourth column describes a change in the solution. • Use the fifth column to predict how the change in the solution will change its pH. solution initial components initial type (check all that apply) change acidic A H₂O basic add HCl O neutral B H₂O, HI acidic basic add NaOH O neutral O acidic C H₂O, HI basic O neutral add Nal D H₂O O acidic basic Oneutral effect of change on pH (check one) O pH higher O pH lower O pH the same pH higher O pH lower O pH the same O pH higher O pH lower O pH the same O pH higher add K Cl O pH lower X pH the same G

Each row of the table below describes an aqueous solution at 25 °C. The second column of the table shows the initial components of the solution. • Use the checkboxes in the third column to explain the type of the initial solution. The fourth column describes a change in the solution. • Use the fifth column to predict how the change in the solution will change its pH. initial type (check all that apply) effect of change on pH (check one) solution initial components change acidic pH higher H,0, H C104 add K C104 A basic pH lower neutral pH the same acidic pH higher В H,0 basic add Na Br pH lower neutral pH the same acidic pH higher H,0, H CIO, basic add KOH pH lower neutral pH the same acidic pH higher H,0 basic add Na OH pH lower neutral pH the same O O OO O O|O O O O O 0 0 0

Consider the following data on some weak acids and weak bases: name acid hydrocyanic acid nitrous acid solution 0.1 M KCN 0.1 M HONH3Br 0.1 M NaNO2 0.1 M KBr formula HCN HNO2 Ka 4.9 × 10 4.5 x 10 X - 10 PH choose one ✓ Use this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on. choose one ✓ choose one choose one name S base formula hydroxylamine HONH₂ ethylamine C₂H5NH₂ | K₂ 1.1 × 10 6.4 × 10 8 4

Each row of the table below describes an aqueous solution at 25 °C. The second column of the table shows the initial components of the solution. • Use the checkboxes in the third column to explain the type of the initial solution. The fourth column describes a change in the solution. • Use the fifth column to predict how the change in the solution will change its pH. initial type solution initial components (check all that apply) O acidic A B с D H₂O H₂O, KOH H₂O H₂O, KOH basic neutral acidic basic neutral acidic basic neutral acidic basic ☐ neutral 00 change add NaC104 add KC1 add NaOH add HCl effect of change on pH (check one) O pH higher O pH lower O pH the same O pH higher O pH lower O pH the same O pH higher O pH lower O pH the same O pH higher O pH lower O pH the same ? olo Ar