Answer:
The answer is D; 1.45 x 10^-4
Hey there!
In a scientific experiment, there are three types of variables: dependent, independent, and control.
Independent variables are the variables that are changed and doesn't depend on another.
Dependent variables are the variables that are depending on the independent variable. When the independent variable changes, it affects the dependent variable.
Control variables are the variables that are kept the same throughout the entire experiment. These don't change at all.
Hope this helps!
Example
H2SO4
H = 2 atoms
S = 32 atoms
O = 4 atoms
atomic mass :
H = 1 u.m.a
S =32 u.m.a
O= 16 u.m.a
H2SO4 = 1 x 2 + 32 x 1 + 16 x 4 = 98 g/mol
hope this helps!
The question is incomplete, the complete question is:
Standardization of a Borax solution (Na2B4O7). A student titrates a 20.00 mL sample of an aqueous borax solution with 1.044 M H2SO4. It takes 2.63 mL of acid to reach the equivalence point. Knowing it takes 1 H2SO4 to neutralize 2 Na2B4O7, what was the concentration of this Borax solution?
<u>Answer: </u>The concentration of borax solution is 0.069 M.
<u>Explanation:</u>
To calculate the concentration of borax solution, the formula used is:
....(1)
where,
are the n-factor, concentration and volume of sulfuric acid
are the n-factor, concentration and volume of borax solution.
We are given:
Putting values in equation 1, we get:
Hence, the concentration of borax solution is 0.069 M.
In acidic solution,<u> [H₃O ] > [OH⁻]. </u> The correct option is C.
<h3>What is hydronium and hydroxide ion?</h3>
Hydronium ion is the simplest form of oxonium ion, and it is derived from the protonation of water. It is produced by dissolving the Arrhenius acid in water.
Hydroxide ion is a diatomic anion formed with oxygen and hydrogen with single covalent bond.
The concentration of hydronium ions in an acidic aqueous solution will be higher than the concentration of hydroxide (OH-) ions.
Thus, the correct option is C, <u>[H₃O ] > [OH⁻].</u>
Learn more about hydronium ion
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