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Lyrx [107]
3 years ago
7

At the equivalence point for a weak acid-strong base titration an equal number of moles of OH- and H+ have reacted, producing a

solution of water and salt. What affects the pH at the equivalence point for a weak-acid/strong-base titration? The basicity of the salt anion The acidity of the salt cation The auto-ionization of water None of these
Chemistry
1 answer:
aev [14]3 years ago
6 0

Answer: The basicity of the salt anion

Explanation:

All the weak acid is neutralized at the equivalence point and transferred to its conjugate base (number of moles of H+ = increased number of moles of OH–). Therefore the solution produced is weakly alkaline and the pH of the equivalence point will be greater than 7.

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Which of the following is an example of a device that transfers one type of energy into another?
Sedbober [7]

Answer:

Energy transfer is the movement of energy from one location to another. For example, when electricity moves from a wall plug, through a charger, to a battery.

Explanation:

Hope this helps

7 0
3 years ago
draw the lewis structure for pcl6, then answer the following questions: 1. how many valence electrons does this compound have? 2
DedPeter [7]

The Pcl6 has 48 bonded electrons and 18 lone pairs.

The Lewis structure of Pcl6 is as follows: -

Phosphorous is bonded with 6 chlorine atoms with 18 lone pairs.

Lewis structures, also known as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDS), are diagrams that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule. [1][2][3] A Lewis structure can be drawn for any covalently bonded molecule, as well as coordination compounds.

    In Lewis structure, atoms are bonded with single bonds. If total number of electrons are 't' and number of bonds are 'n', then t-2n number of electrons are to be placed. Once the central atom is placed, they need to complete the octet rule.

Learn more about Lewis-dot structure from,

brainly.com/question/18083461

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5 0
1 year ago
Activation energy Group of answer choices is only required in catabolic reactions that release energy. is not required at all wh
daser333 [38]

Answer:

is used to break reactant bonds and/or make new product bonds.

Explanation:

<em>The correct answer would be that </em><em>activation energy is used to break reactant bonds and/or make new product bonds</em><em>.</em>

The <u>activation energy is the minimum energy that must be overcome by the reactants in a reaction in other to become products</u>. In order for products to be formed, the bonds between reactants must be broken and new ones must be formed to arrive at the products. In other words, the activation energy can be seen as the energy required to break the bonds between reactants and form the bonds between products during the course of a reaction.

<em>Activation energy is required even in the presence of enzymes. The latter only catalyzes reactions by lowering the minimum energy required to break the bonds between reactants and form new ones between products</em>.

5 0
3 years ago
Calculate the mass of water if the densityis 1.02 g/mL and the volume is 62 ml. M = (D(V)
schepotkina [342]

Answer:

<h2>The answer is 63.24 g</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

volume = 62 mL

density = 1.02 g/mL

The mass of the water is

mass = 1.02 × 62

We have the final answer as

<h3>63.24 g</h3>

Hope this helps you

7 0
3 years ago
What is the role of a scientist
Semenov [28]

Answer:

This is what they usually do.

Explanation:

Scientists are often people who want to see change occur. ... Today, the role of a scientist is the same. We have the obligation to explore and discover. Scientists use their resources to bring about change, whether it is change in medicine, improvements in the environment, or creating more efficient fuels

3 0
3 years ago
Read 2 more answers
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