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3 years ago

What is the definition of state in properties of matter

1 answer:

7 0

<span>In physics, a state of matter is one of the distinct forms that matter take on Four States of matter are observable in everyday life: solid, liquid, gas, and plasma. </span>

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Calculate the pH of a solution if the concentration of hydronium ions (H3O+) is 4.8 x 10-11M?

Gelneren [198K]

Answer:

Explanation:

[ H₃O⁺¹] = 4.8 x 10⁻¹¹ mol / l

H₃O⁺¹ = H₂O + H⁺

[ H₃O⁺¹] = [H⁺]

pH = -log[H⁺]

= -log[ 4.8 x 10⁻¹¹]

= -log 4.8 + 11

= - 0 .68 + 11

= 10.32

6 0

3 years ago

A 25.00 ml sample of an aqueous solution of ba(oh)2 requires 18.45 ml of 0.01500 m hcl (aq) for its neutralization. what is the

klio [65]

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

$\boxed{ \ M = \frac{n}{V} \ }$ $\rightarrow \boxed{ \ n = MV \ }$

$\boxed{ \ Ba(OH)_2 \rightarrow n = (x \ \frac{mol}{L})(25 \ ml) = 25x \ mmol \ }$

$\boxed{ \ HCl \rightarrow n = (0.015 \ \frac{mol}{L})(18.45 \ ml) = 0.277 \ mmol \ }$

Step-2: neutralization

We use the ICE table to see how neutralization occurs between acid and base.

Balanced reaction:

$\boxed{ \ Ba(OH)_2_{(aq)} + 2HCl_{(aq)} \rightarrow BaCl_2_{(aq)} + 2H_2O_{(l)} \ }$

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.

$\boxed{ \ 25x - \frac{1}{2}(0.277) = 0 \ }$

$\boxed{ \ 25x = \frac{1}{2}(0.277) \ }$

$\boxed{ \ 50x = 0.277 \ }$

$\boxed{ \ x = \frac{0.277}{50} \ }$

$\boxed{ \ x = 5.54 \times 10^{-3} \ }$

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: $\boxed{ \ V_b \cdot M_b \cdot valence \ of \ base = V_a \cdot M_a \cdot valence\ of \ acid \ }$

$\boxed{ \ (25.00 \ ml) \cdot x \cdot 2 = (18.45 \ ml) \cdot (0.015 \ M) \cdot 1 \ }$

$\boxed{ \ x = \frac{(18.45 \ ml) \cdot (0.015 \ M)}{(25.00 \ ml) \cdot 2} \ }$

Thus the same results were obtained. The molarity of Ba (OH) ₂ solution is 5.54 x 10⁻³ M.

<h3>Learn more</h3>

What is the concentration of a solution formed by diluting 25.0 ml of a 3.2 M NaCl solution to 135.0 ml? brainly.com/question/12452615
How much of these solutions he needs to drain and replace with 70% acid solution to obtain 100g of 60% acid solution? brainly.com/question/7596086
How many liters of the 50% solution and how many liters of the 90% solution will be used? brainly.com/question/13034221

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3 years ago

Which of the following is the correct Lewis structure for ammonia (NH3)? Note: Hydrogen and nitrogen have one and five valence e

mart [117]

Three hydrogen will provide three valence electrons and nitrogen has five valence electrons all in all they 8 valence electron
**
H*«N«*H=NH3
«*
H

4 0

4 years ago

Read 2 more answers

What do the symbols in parenthesis indicate? C7H16 (l) + 11O2 (g) 7CO2 (g) + 8H2O (l)

Temka [501]

The symbols in the parenthesis represents state of that matter.( l )represents liquid, (g) represents gas, (s) represents solid and (aq) represents aqueous. Hope this helps.

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4 years ago

How many bonds are broken in the combustion of one methane molecule?.

Liono4ka [1.6K]

According to the number of bonds present in a methane molecule, in the combustion of one methane molecule, four C-H covalent bonds are broken.

<h3>How many bonds are broken in a methane molecule?</h3>

A methane molecule is composed of four atoms of hydrogen and one atom carbon.

The formula of a methane molecule is CH4.

The bonds present in methane molecule are four C-H covalent bonds.

Therefore, in the combustion of one methane molecule, four C-H covalent bonds are broken.

Learn more about about methane at: brainly.com/question/25419929

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2 years ago