Answer:
pH is a measure of hydrogen ion concentration, a measure of the acidity or alkalinity of a solution. The pH scale usually ranges from 0 to 14. Aqueous solutions at 25°C with a pH less than 7 are acidic, while those with a pH greater than 7 are basic or alkaline. A pH level of 7.0 at 25°C is defined as "neutral" because the concentration of H3O+ equals the concentration of OH− in pure water. On the other hand, electrical conductivity is a non-specific measurement of the concentration of both positively and negatively charged ions within a sample. So the short answer to the question is as follows, the presence of any hydrogen ions present in a substance will impact the pH level and most probably influence conductivity levels. However, hydrogen ions make up only a small part of the ion concentration measured by a conductivity meter.
We know that 
, where 
is density, 
is mass, and 
is volume.
Substitute in the values we know and solve:
2 Ca₅(PO₄)₃F + 7 H₂SO₄ → 3 Ca(H₂PO₄)₂ + 7 CaSO₄ + 2 HF
Explanation:
To balance the chemical reaction the number and type of atoms entering the reaction have to be equal to the type and atoms leaving the reaction.
In our case we have:
10 Ca entering the reaction and 10 Ca leaving the reaction
6 PO₄ groups entering the reaction and 6 PO₄ groups leaving the reaction
2 F entering the reaction and 2 F leaving the reaction
7 SO₄ groups entering the reaction and 7 SO₄ groups leaving the reaction
14 H entering the reaction and 14 H leaving the reaction
Learn more about:
balancing chemical equations
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Sandblasted: More smooth because all the rough edges are "blasted" away. And slightly smaller because of the loss of the edges.
Non-Sandblasted: Not smooth; rough.
