Organizing and retrieving lab results is a key part of data analysis in chemistry. In this challenge, you will use lists and dictionaries to map sample names to their pH values and retrieve the pH for a specific sample.

• Create a dictionary where each key is a sample name from the sample_names list and each value is the corresponding pH from the pH_values list.
• If the query_sample exists in the dictionary, retrieve its pH value; otherwise, return None for the pH.
• Return both the dictionary and the retrieved pH value.