The particles are quite tightly packed together but still have enough room to be able to move and flow, their bonds aren't as strong as a solids are
<span> Heterogeneous mixture because the components are not or can't be mixed uniformly..
Ex : Oil in water or Sand in water </span>
Answer
is: pH = 8,046.<span>
c(H</span>₃O⁺) = 4·10⁻⁹ M
= 4·10⁻⁹ mol/L = 0,000000004 mol/L.<span>
pH = -logc(H</span>₃O⁺).<span>
pH = -log(</span>4·10⁻⁹ mol/L<span>).
pH = -(-8,046) = 8,046.
When pH is less than seven (pH<7),
solution is acidic.
When is equal seven (pH = 7), solution is
neutral.
When pH is greater than seven (pH >
7), solution is basic </span>(like this example).