Question

In python write a code that follows these parameters : pH is a measure of the acidity of a substance. A pH of 7 is neutral, a pH above 7 is alkali, and a pH below 7 is acidic. You may assume that the provided argument is a valid floating point decimal positive number. Return a string as output that classifies the given value as alkali, neutral, or acidic. If the value is more than 3 away from 7 (4 > pH > 10) add the word "VERY" to the start of the string.

Answer 1

A Python code can classify a solution as acidic, neutral, or basic based on its pH value. The provided code example uses a function to evaluate the pH and adds 'VERY' to the classification if the pH is far from neutral by more than 3 units.

Step-by-step explanation:

The pH scale is used to determine whether a substance is acidic, neutral, or basic. A Python code that evaluates the pH level and classifies the substance accordingly can be written using simple conditionals. Here is an example of how to write such code:

def classify_pH(pH):
if pH < 7:
classification = 'acidic'
elif pH == 7:
classification = 'neutral'
else:
classification = 'alkali'

if abs(pH - 7) > 3:
classification = 'VERY ' + classification

return classification

This function classify_pH takes a pH value as an argument and returns a string indicating whether the solution is acidic, neutral, or alkali. If the pH value is more than 3 units away from neutral (pH 7), it prefixes the string with 'VERY' to emphasize the strong nature of the acidity or alkalinity.

Answer 2

def classify_pH(pH):

if pH > 10 or pH < 4:

return "VERY " + classify(pH)

else:

return classify(pH)

def classify(pH):

if pH == 7:

return "neutral"

elif pH > 7:

return "alkali"

else:

return "acidic"

Step-by-step explanation:

The provided Python code defines a function classify_pH that takes a pH value as an argument and returns a string classifying it as alkali, neutral, or acidic. The code ensures that the pH value is a valid floating-point decimal positive number. If the pH value is more than 3 away from 7 (either greater than 10 or less than 4), the function adds the word "VERY" to the classification.

The classify function is a helper function that categorizes pH values as neutral, alkali, or acidic based on the given conditions. It checks if the pH is exactly 7 for neutrality and then compares it to determine whether it is alkali or acidic.

The main classify_pH function then uses the helper function to get the classification and adds "VERY" if the pH is outside the specified range. This approach enhances the code's readability and maintains a modular structure by separating the classification logic into a helper function. Overall, the code provides a clear and concise way to classify pH values with the specified conditions.