Based on the question, it is evident that the question is based on Boyle's Law which we will use to find the answer necessary.
Now, Boyle's Equation: P₁V₁ = P₂V₂
V₂ = P₁V₁ ÷ P₂
∴ V₂ = (12.5L × 42.0 cm · Hg) ÷ 75 cm · Hg
⇒ V₂ = 7 L
Thus, the <span>volume when the pressure has increased to 75.0 cm Hg is 7 Litres.</span>
The correct answer is c. H3PO4 2H++ HPO42¯(Phosphoric acid)
<h3>
Phosphoric acid</h3>
Known also as ortho-phosphoric acid, phosphoric acid is a triprotic acid that occurs as a viscous liquid. It irritates or corrodes human skin, eyes, and other mucous membranes as well as those of experimental animals. However, the irritancy potential of its salts is much smaller. When mice were exposed through inhalation, moderate toxicity was seen. Both phosphate salts and phosphoric acid have been shown to enhance the action of recognized carcinogens, however phosphoric acid alone is neither genotoxic nor carcinogenic. Typically, irrigation or water flushing are used to treat exposures. As a food addition to different cola drinks, phosphoric acid has attracted a lot of attention but also generated a lot of debate due to its potential for negative effects.
Which chemical equation shows the dissociation of 2 protons from trihydrogen phosphate
(phosphoric acid)? (other substances / rxns can be used)
a. H3PO4 H2++ HPO4¯
b.H3PO4 H22+ + PO42¯
c. H3PO4 2H++ HPO42¯
d. H3PO4 H33+ + PO43¯
Learn more about Phosphoric acid here:
brainly.com/question/3700851
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Answer:
<span>The energy involved in endothermic and exothermic reactions is Heat.
Explanation:
In Endothermic Reactions the energy required to break the bonds is greater than the amount of energy released on bond formation. This required excess energy is absorbed from surrounding in the form of heat. Hence, the temperature of surrounding drops.
While, </span>In Exothermic Reactions the energy required to break the bonds is less than the amount of energy released on bond formation. This excess energy is released to the surrounding in the form of heat. Hence, the temperature of surrounding rises.
Firstly calculating number of moles of hcl disssolved. The answer would be in the pic above. Concentration of hydrogen ions can be calculated by using that mole amount dividing by 3litres of solution to get 0.003196. Hence the ph of solution will be -log10(h+ concentration) which is equal to 2.495
