Answer:
K20(s)+H2O(L) -> 2KOH(aq)
Answer:
B science of working with metals
5.54 x 10⁻³ M
<h3>
Further explanation</h3>
Given:
Neutralization reaction between:
- 25.00 ml of Ba(OH)₂
- 18.45 ml of 0.015 M HCl
Question:
What is the molarity of the Ba(OH)₂ solution?
The Process:
Let us say the molarity of the Ba (OH)₂ solution as x M.
Step-1: prepare moles for each reagent
Step-2: neutralization
We use the ICE table to see how neutralization occurs between acid and base.
Balanced reaction:
Initial: 25x 0.277 - -
Change: - ¹/₂ · (0.277) -0.277 +¹/₂ · (0.277) +0.277
Equlibrium: - - +¹/₂ · (0.277) +0.277
- Neutralization causes no excess of hydrogen or hydroxide ions in solution. In the end, the number of acid and base reactions is balanced. In other words, the two reagents have run out with nothing left.
- HCl acts as a limiting reagent.
Step-3: calculate the molarity of the Ba(OH)₂ solution.
We consider Ba (OH) from the initial, change, and equilibrium stages.
Thus, the molarity of the Ba(OH)₂ solution is 5.54 x 10⁻³ M.
_ _ _ _ _ _ _ _ _ _
Alternative Steps
- Valence of base = the number of OH⁻ ions
- Valence of acid = the number of H⁺ ions
Neutralization:
Thus the same results were obtained. The molarity of Ba (OH) ₂ solution is 5.54 x 10⁻³ M.
<h3>
Learn more</h3>
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Since the ethanol has a density of 0.800 g/mL, the mass of the ethanol is 180 grams.
<u>Given the following data:</u>
- Volume of ethanol = 225 mL
- Density of lead ball = 0.800 g/mL.
To find the mass of the ethanol;
Density can be defined as mass all over the volume of an object.
Mathematically, the density of a substance is given by the formula;
Making mass the subject of formula, we have;
Substituting the given parameters into the formula, we have;
<em>Mass of ethanol </em><em>=</em><em> 180 grams.</em>
Read more: brainly.com/question/18320053
The light reflected from the surface of the Moon takes only a second to reach Earth. The Sun is more than 8 light-minutes away. And so, if the light from the nearest star (Alpha Centauri) takes more than 4 years to reach us, we're seeing that star 4 years in the past.