Physics, 16.10.2019 00:00, Fuzez4934

He number of hydrogen ions would equal the number of hydroxide ions in a solution with a ph of

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answered: missmontgomery21

The number of hydrogen ions would equal the number of hydroxide ions in a solution with a pH of 7.

Explanation :

The substance’s acidic or basic nature is determined by its pH value which is the indication of the number of free hydrogen ion ( $H^{+}$ ). The pH value and the alkalinity can be measured by pH scale which varies from 0 to 14. Neutral water has the pH value of 7 with equal number of hydrogen ions ( $H^{+}$ ) and Hydroxide ions ( $O H^{-}$ ).

A substance with a pH value above than 7 is counted amongst the base whereas those with a pH value are counted amongst the acids. When a solution gets ten times more acidic, the pH value falls by the count of one.

There are various methods to determine the pH value of any substance and the most effective and quick one is the pH indicator paper. When the indicator paper is dipped in the water solution of the substance, it colour changes according to the different pH value. Another effective method to determine the pH value is the use of pH electrodes.

answered: Guest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

answered: Guest

conservation of mass

mass before something happens = mass afterwards

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He number of hydrogen ions would equal the number of hydroxide ions in a solution with a ph of...