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The pH scale is used to rank solutions in terms of acidity or basicity (alkalinity). Since the scale is based on pH values, it is logarithmic, meaning that a change of 1 pH unit corresponds to a ten-fold change in H + ion concentration. The pH scale is often said to range from 0 to 14, and most solutions do fall within this range, although ...
Jan 30, 2023 · It is common that the pH scale is argued to range from 0-14 or perhaps 1-14, but neither is correct. The pH range does not have an upper nor lower bound, since as defined above, the pH is an indication of concentration of H +. For example, at a pH of zero the hydronium ion concentration is one molar, while at pH 14 the hydroxide ion ...
Sep 30, 2020 · The pH scale shows how acidic or basic a chemical is in aqueous solution (mixed with water). The scale runs from 0 (most acidic) to 14 (most alkaline or basic), where 7 is neutral pH. Chemicals with pH values from 0 up to 7 are acids, those with a pH value of 7 are neutral, and those with pH values greater than 7 up to 14 are bases.
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What does the pH scale show?
Why is pH a negative logarithmic scale?
What is concentrated sodium hydroxide (NaOH)?
As one of the simplest hydroxides, sodium hydroxide is frequently used alongside neutral water and acidic hydrochloric acid to demonstrate the pH scale to chemistry students. Sodium hydroxide is used in many industries: in the making of wood pulp and paper, textiles, drinking water, soaps and detergents, and as a drain cleaner. Worldwide ...
- NaOH
- 39.9971 g/mol
- 323 °C (613 °F; 596 K)
- 418 g/L (0 °C), 1000 g/L (25 °C), 3370 g/L (100 °C)
pH + pOH = 14 (Eq. 3) This relationship can be used to convert between pH and pOH . In combination with Eq. 1a/b and Eq. 2a/b, we can always relate pOH and/or pH to [ OH −] and [ H +] . For a derivation of this equation, check out the article on the autoionization of water.
- How does the temperature affect the pH and pOH?At 100C the pH of water is 6.14, so higher temperature decreases the pH. The opposite is true for pOH: higher temperatures increases the pOH.
- What does M stand for in the unit labels?M stands for the unit of Molarity of the solution.
- Can someone please explain what are monoprotic and diprotic acids? Thanks.H2SO4 is a typical diprotic acid (2 protons can be released in aqueous solution, however one at that time) H2SO4 +H20 gives HSO4- + H+/H3O+ then, H...
- Could someone explain the difference between acid strength and concentration? According to me, a str...Nice question!! It is important that you don't confuse the words strong and weak with the terms concentrated and dilute. At the same concentration,...
- how can we solve pH,pOH numericals without using scientific calculator during our examination?Unless you are using perfect numbers of base ten (e.g. 10^-7, 10^-2, etc.) there is no way to do it because you cannot easily do logarithms. If you...
- How can NaOH have a pH scale? How can a base add H+ ions to the solution? It adds OH- ions right?NaOH does not have a pH, but an aqueous solution of NaOH does. Water contains both H⁺ and OH⁻ ions. Adding NaOH increases the concentration of OH⁻...
- How does pH+pOH= 14? Where does the random number come in?There is no random number. The formula comes from the ion product for water. [H⁺][OH⁻] = 1.00 × 10⁻¹⁴ ∴ pH + pOH = 14.00
- Hi I feel like there's a step missing.I'm not sure why the pH as an exponent is negative & where the...This is the _power rule_ of logs. When you have a number in front of a log term, this is the same as raising the log term to that number. For examp...
- what is -log? is it a number?Log is a maths function, it stands for logarithm. We use a log scale so we can visualise the concentration of H+ ions easier as we don't without ha...
16.4: The pH Scale is shared under a CC BY-NC-SA 3.0 license and was authored, remixed, and/or curated by LibreTexts. The concentration of hydronium ion in a solution of an acid in water is greater than \ ( 1.0 \times 10^ {-7}\; M\) at 25 °C. The concentration of hydroxide ion in a solution of a base in water is ….
Mar 5, 2020 · The pH scale measures whether there is more hydronium or hydroxide in a solution. In other words, it tells us how basic or acidic the solution is. A lower pH means something is more acidic, also known as a stronger acid. A higher pH means it is more alkaline or a stronger base. Chemistry classes will often use a litmus test to identify acids ...
