Question

1. Write the letter of the following true statements. And also, write corrected versions for any false statements.

A. The pH of an alkaline solution is less than 7.
B. The more acidic a solution, the higher the pH.
C. You can use universal indicator to find out the pH of a solution.
D. Alkalis are the substances which are soapy to touch and sweet in taste.

2.​​ A student has a glass of essential oil. Its volume is 50 ml. It has a mass of 40 g. Use the equation below to calculate its density.
density = mass/ volume​​

Answer 1

A. False (The pH of an alkaline solution is greater than 7.)

B. True

C. True

D. False (Alkalis are usually soapy to touch and have a bitter or metallic taste.)

Corrected versions:

A. The pH of an alkaline solution is greater than 7.

D. Alkalis are usually soapy to touch and have a bitter or metallic taste.

Calculation:

To calculate the density of the essential oil, you would use the following equation:

density = mass/volume

Plugging in the given values, you would get:

density = 40 g/50 ml = 0.8 g/ml