Molecules on an acid–base indicator react chemically with ions in a solution, causing the indicator to change color. which ions in the solution cause this reaction? oxygen ions water ions hydrogen ions nitrogen ions

The correct answer is hydrogen ions.

Explanation:

Acid-base indicator is used to detect the pH of the solution.

pH is defined as the negative logarithm of hydrogen ion concentration present in the solution.

The equation representing the reaction between hydrogen ions and acid-base indicator follows:

Hence, the correct answer is hydrogen ions.

the correct answer is option d

explanation:

i was wrong its d because they dont use cm when calculating square roots

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.