3 years ago

A student measures the pH of a solution to be 6.8. Which should the student add if she wants to decrease the pH of the solution?

2 answers:

7 0

The neutral pH is 7. Less than 7 indicates an acid and more than 7 indicates a base (up to 14).
 NaCl - it's a salt (we can't measure the pH)
H2O - it can be an acid but also a base (the pH it is almost neutral,meaning close to 7 )
HF - it is a strong acid
 KOH - it is a strong base (pH=14)

↓

He needs to use HF (Hydrogen fluoride) to decrease the pH.

vichka [17]3 years ago

5 0

HF is the answer because it is an acid so it decreases overall ph. Did you understand?

You might be interested in

How many oxygen (O) atoms are in a molecule of SiO2? O A. 1 OB. 3 C. 4 D. 2

mafiozo [28]

I believe it is D. 2

3 0

3 years ago

Read 2 more answers

Newton’s first law describes the tendency calles

beks73 [17]

The first law is about force or push and pull

5 0

3 years ago

Read 2 more answers

In terms of matter and resources, Earth is essentially a(n) ________ system ; in terms of energy, Earth is a(n) ________ system.

Savatey [412]

Answer:

Explanation:

6 0

3 years ago

Which type of wave does NOT have a crest?

ahrayia [7]

B is your answer oscillating

4 0

3 years ago

Be sure you understand why a pendulum in equilibrium hanging in a car that is accelerating forward tilts backward, and then cons

Gnesinka [82]

Answer:

A helium filled balloon floats forwards in a accelerating car because of the pressure difference between the front and the back of the car. When the car is accelerating, the air moves relitive to the car and the consequence is that the pressure in the back is slightly higher than in the front; which results in net force in forward direction.

hit that heart please leave brainliest and let me know if want me to answer or explain it in a different way :)

6 0

3 years ago