PLS HELP
2 answers:
You might be interested in
Answer:
(a)
(b)
(c)
(d)
(e)
Explanation:
To calculate de pH of an acid solution the formula is:
were [H^{+}] is the concentration of protons of the solution. Therefore it is necessary to know the concentration of the protons for every solution in order to solve the problem.
(a) and (c) are strong acids so they dissociate completely in aqueous solution. Thus, the concentration of the acid is the same as the protons.
(b) and (e) are strong bases so they dissociate completely in aqueous solution too. Thus, the concentration of the base is the same as the oxydriles. But in this case it is necessary to consider the water autoionization to calculate the protons concentration:
clearing the
(d) is a weak base so it is necessary to solve the equilibrium first, knowing
The reaction is →
so the equilibrium is
clearing the <em>x</em>
The density of the wood : 1.45 g/cm³
<h3>Further explanation </h3>Density is a quantity derived from the mass and volume
Density is the ratio of mass per unit volume
With the same mass, the volume of objects that have a high density will be smaller than objects with a smaller type of density
The unit of density can be expressed in g/cm³ or kg/m³
Density formula:
ρ = density
m = mass
v = volume
- Volume of the wood
- density