Question

1. a solution has a ph of 4. the solution is (acidic)/ basic.
2. a solution has a ph of 12. the solution is acidic/ (basic).
3. a solution has a ph of 7. the solution is acidic/ basic/ (neutral).
4. a solution has a concentration of 0.01 mol/l. this solution can be classified as concentrate/ (dilute) solution.
5. a solution has a concentration of 1 mol/l. this solution can be classified as concentrate/ dilute solution.
6. a solution of hcl has a concentration of 1 mol/l. this solution can be classified as:

a) dilute strong acid
b) concentrate strong acid
c) dilute weak acid
d) concentrate weak acid

1. a solution of ba(oh)₂ has a concentration of 0.1 mol/l. this solution

Explanation:

Step1: Recall pH scale rules

pH < 7 = acidic; pH =7=neutral; pH>7=basic

Step2: Recall concentration conventions

For most aqueous solutions, ~<0.1mol/L = dilute; ~≥1mol/L = concentrated

Step3: Classify HCl solution

HCl is a strong acid; 1mol/L is concentrated.

Step4: Solve remaining incomplete Q7

Ba(OH)₂ is strong base; 0.1mol/L is dilute.

Answer:

1. acidic
2. basic
3. neutral
4. dilute
5. concentrate
6. b) concentrate strong acid
7. dilute strong base