Ph scale class 10

Question 1 What does pH of a solution signify? Question 2 You have 2 solutions A and B. The pH of solution A is 6 and pH of solution B is 8.Which of the solution has more hydrogen ion concentration? Question 3 Three solutions A,B and C have pH values of 6,4 and 10.Which of the solution is highly acidic? Question 4 The pH of a solution is 5.What will be its action on blue and red litmus? Question 5 Name the scientist who discovered pH scale? Question 6 Two solutions A and B have pH values of 3 and 9.Which will turn phenolphthalein from colourless to pink? Question 7 What is the pH of neutral solution? Question 8 Fresh milk has a pH of 6>how do you think the ph would change as it turns into curd? Question 9 What effect does the concentration of hydrogen ion have on nature of the solution? Strength of Acid and base: pH Scale In pure water [H +] = [OH –] 1) Pure water + acid(produce H +) → Concentration of hydrogen ion(H +) increases Solution will have more of hydrogen ion(H +). 2) Pure Water + base (Produce OH-) → Concentration of OH- increases Solution will have more of OH- ions. In 1909 Sorenson gave a scale known as pH scale. The strength of an acid as well as basic solution can be represented by making use of Hydrogen ion concentration (H +)in them. The pH of a solution is inversely proportional to hydrogen ion in it. High the concentration of hydrogen ion lower will be its pH. Lower the concentration of hydrogen ion Higher will be its pH. P represents potenz means power ...

Acidic or Basic? What is an acid or a base? Whether a liquid is an acid or a base has to do with hydrogen ions (abbreviated with the chemical symbol H +). In water (H 2O), a small number of the molecules dissociate (split up). Some of the water molecules lose a hydrogen and become hydroxide ions (OH −). The "lost" hydrogen ions join up with water molecules to form hydronium ions (H 3O +). For simplicity, hydronium ions are referred to as hydrogen ions H +. In pure water, there are an equal number of hydrogen ions and hydroxide ions. The solution is neither acidic or basic. An acid is a substance that donates hydrogen ions. Because of this, when an acid is dissolved in water, the balance between hydrogen ions and hydroxide ions is shifted. Now there are more hydrogen ions than hydroxide ions in the solution. This kind of solution is acidic. A base is a substance that accepts hydrogen ions. When a base is dissolved in water, the balance between hydrogen ions and hydroxide ions shifts the opposite way. Because the base "soaks up" hydrogen ions, the result is a solution with more hydroxide ions than hydrogen ions. This kind of solution is alkaline. What is pH? Acidity and alkalinity are measured with a logarithmic scale called pH. Here is why: a strongly acidic solution can have one hundred million million, or one hundred trillion (100,000,000,000,000) times more hydrogen ions than a strongly basic solution! The flip side, of course, is that a strongly basic solution can have ...

Even if you’ve never set foot in a chemistry lab, chances are you know a thing or two about acids and bases. For instance, have you drunk orange juice or cola? If so, you know some common acidic solutions. And if you’ve ever used baking soda, or even egg whites, in your cooking, then you’re familiar with some bases as well 1 ^1 1 start superscript, 1, end superscript . H 2 \text (aq) start text, left parenthesis, a, q, right parenthesis, end text As shown in the equation, dissociation makes equal numbers of hydrogen (H + ^+ + start superscript, plus, end superscript ) ions and hydroxide (OH − ^- − start superscript, minus, end superscript ) ions. While the hydroxide ions can float around in solution as hydroxide ions, the hydrogen ions are transferred directly to a neighboring water molecule to form hydronium ions (H 3 _3 3 ​ start subscript, 3, end subscript O + ^+ + start superscript, plus, end superscript ). So, there aren't really H + ^+ + start superscript, plus, end superscript ions floating around freely in water. However, scientists still refer to hydrogen ions and their concentration as if they were free-floating, not in hydronium form – this is just a shorthand we use by convention. Is that a lot or a little? Although the number of hydrogen ions in a liter of pure water is large on the scale of what we usually think about (in the quadrillions), the number of total water molecules in a liter – dissociated and undissociated – is about 33,460,000,000,000,000,000,000...

The p H scale is a scale showing relative strength of acids and alkalis. The p H of a solution is equal to the negative power to which 10 must be raised in order to express hydrogen ion concentration. [ H + ] = 1 0 − p H The p H of solution is the negative logarithm of its hydrogen ion concentration. p H = − l o g [ H + ] For neutral solution, p H = 7, for acidic solution, p H 7

In aqueous solution, an acid is defined as any species that increases the concentration of H + ( a q ) \text^-(aq) OH − ( a q ) start text, O, H, end text, start superscript, minus, end superscript, left parenthesis, a, q, right parenthesis . Typical concentrations of these ions in solution can be very small, and they also span a wide range. For example, a sample of pure water at 25 ∘ C 25\,^\circ\text^+] [ H + ] open bracket, start text, H, end text, start superscript, plus, end superscript, close bracket for stomach acid is approximately 6 6 6 6 orders of magnitude larger than in pure water! To avoid dealing with such hairy numbers, scientists convert these concentrations to pH \text pOH start text, p, O, H, end text . pH = − log ⁡ [ H + ] (Eq. 1a) \text pH = − lo g [ H + ] (Eq. 1a) start text, p, H, end text, equals, minus, log, open bracket, start text, H, end text, start superscript, plus, end superscript, close bracket, start text, left parenthesis, E, q, point, space, 1, a, right parenthesis, end text For example, if we have a solution with [ H + ] = 1 × 1 0 − 5 M [\text pH start text, p, H, end text using Eq. 1a: [ H + ] = 1 0 − pH (Eq. 1b) [\text H^+]=10^ [ H + ] = 1 0 − pH (Eq. 1b) open bracket, start text, H, end text, start superscript, plus, end superscript, close bracket, equals, 10, start superscript, minus, start text, p, H, end text, end superscript, start text, left parenthesis, E, q, point, space, 1, b, right parenthesis, end text pOH = − log ⁡ [ OH − ] ...

pH Of Acids And Bases What is pH? pH Definition pH is defined as the negative logarithm of H + ion concentration. Hence the meaning of the name pH is justified as the power of hydrogen. We know that all the acids and bases do not react with the same chemical compound at the same rate. Some react very vigorously, some moderately while others show no reaction. To determine the strength of acids and bases quantitatively, we use a universal indicator which shows different colours at different concentrations of Table of Contents • • • • • • • • • • • pH Chemistry A pH scale is a tool for measuring acids and bases. The scale ranges from 0-14. Litmus paper is an indicator used to tell if a substance is an acid or a base. The colour of the paper matches up with the numbers on the pH scale to indicate what kind of substance is being tested. For example, Vinegar is an acid and measures 2.4 on the pH scale. A healthy pH balance plays a significant role in your overall well-being, and doctors and scientists usually agree on this. The pH level, or possible level of hydrogen in your body, is determined by the food and type of drink you consume. The pH is the concentration of the hydrogen ions. This calculation is based on a pH scale. The pH scale is logarithmic and shows the solution’s concentration of hydrogen ions inversely. More specifically, the pH of the solution is the negative logarithm to the base 10 of its hydrogen ion concentration in moles per litre. The pH scale can be trace...

Yo dude, Well, the arrhenius definition of an acid and base is dependent on the amount of H+ and OH- ions respectively' In breif, Higher the amount of H+(aq.)*ions = *More acidic a solution is. Higher the amount of OH-(aq)* ions = *More basic a solution is. I highly recommend you to visit the videos on 'the arrhenius definition of an acid and base' here in Khan Academy. If you have any more doubts related to this let me know, I'll try my best to answer. Onward! P.S, the solution has to be( most of the time) Aqueous( dissolved in water). let's solve some problems on how change in concentration of H+ and OH h minus sign changes the pH of the solution and even vice versa so here is my first problem when acid rain mixes with the river water the concentration of H+ ion increases so it's given to us that the concentration of H+ ion this is increasing when the concentration of H+ ion increases pH of the river water - meaning what is happening to the pH of the river water if the concentration of H+ ions is increasing okay we know that if a solution has excess of h+ ions that means is acetic and if the concentration of h+ science is increasing meaning the amount of h+ ions in the solution is increasing that means the solution is becoming more acidic see the acidic nature of the solution depends on the concentration of h+ ions if more concentration of h+ ions then more acetic is the solution just like if in a suger solution the concentration of sugar that increased that means it's m...

• The pH scale shows how acidic a substance is. It can be measured using a pH meter which gives a numerical value. • The pH scale ranges from 0 (very acidic ) through 7 ( neutral ) to 14 (very alkaline ). • pH can be also be measured using an indicator and comparing the colour with a comparison chart. VOICEOVER: The pH scale The pH scale measures how strongly acidic or alkaline a solution is using a set of values from pH 0 to pH 14. When pure water is dropped into a solution of universal indicator, the indicator stays green. This indicates a pH value of 7 and tells us that water is neither alkaline or acid, but neutral. Acidic solutions have pH values less than 7. Stomach acid turns universal indicator paper a strong red colour. This indicates a pH value of 0, the strongest value of acid. Alkaline solutions have pH values more than 7. Toothpaste will turn universal indicator paper blue indicating a pH value of 9, which is a weak alkali. The pH scale is a number scale from 0 to 14. It tells us how acidic or alkaline an aqueous solution is. The pH scale is used to classify solutions as acidic, alkaline or neutral. • Neutral solutions are exactly pH 7. • Acidic solutions have pH values less than 7. The closer to pH 0, the more acidic a solution is. • Alkaline solutions have pH values more than 7. The closer to pH 14, the more alkaline a solution is. Solutions can be acidic, alkaline or neutral. For example, pure water is neutral with a pH of 7. A solution of common salt (sodi...

I got confused how we can calculate -log[proton] on the calculator. Some people says log on calculator always has base 10, but some other people say the base is e. Isn't the log base e is equal to ln? Same to writing, I saw physics teachers write log and they say in physics, its base is e, but my chemistry teacher says the base is 10. How can we know whether the base is 10 or e? The difference is: *If you just have "log" (without a base underneath) it means it is base 10, it is implied. *On the other hand if you have "ln", it is implied that you have a base of "e" (Euler's constant). Logarithms are largely used in a lot of different fields of study, and their base depends on the phenomenon that you are referring to (basically, you use the one that helps you the best to explain that certain phenomenon), that's why sometimes you might even find bases even different than e or 10, although these are the ones that are used the most. bleach is basically a solution of sodium HypoChlorite, or NaClO. This is a salt that contains the anion of the weak acid HClO, hypochlorous acid, and the cation of the strong base, NaOH. Because NaOH is a strong base, it fully dissociates into Na+ ions and OH- ions. However, the HClO is weak and does not fully dissociate. Therefore, there is more OH- ions inside the solution and less H+ ions. This makes a Basic Solution. Consider a given amount of water. If we add n equivalents of an acid ((H sub y) x), y being the number of hydrogen ions in one mol...