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What colour will appear when hydrochloric acid react to sodium hydroxide with a few drop of universal indicator?
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Will strong acids turn universal indicator paper purple?
The pH scale ranges from 0-14. Universal indicator makes very acidic substances (with a pH of around 0) appear dark red, neutral ones green and very alkaline ones dark blue.
What happens if calcium hydroxide is added to carbonated water?
the calcium hydroxide will disolve while a bubbles appear
What hazard sign should appear on a bottle of sodium hydroxide?
CORROSIVE
End point of titration should be at pH?
A titration usually has an acid (pH 0-6) in the burette and an alkali (pH 8-14) in the conical flask below the burette. Your aim is to neutralise the two solutions by titrating them against each other.So the endpoint pH should be 7 (universal indicator/litmus paper will appear a greenish colour). The solution in the conical flask is neutral.Hope this Helps!
Effect of methyl red to acid and base?
It's an indicator that turns red with acids and yellow with bases (though I prefer to use the term alkalis).Actually, that answer is not strictly true because it will turn yellow at a pH of slightly less than pH 7 (neutral) so some weak acids will appear to be alkaline with this indicator.
Will strong acids turn universal indicator paper purple?
The pH scale ranges from 0-14. Universal indicator makes very acidic substances (with a pH of around 0) appear dark red, neutral ones green and very alkaline ones dark blue.
What happens if calcium hydroxide is added to carbonated water?
the calcium hydroxide will disolve while a bubbles appear
What is the difference between a universal indicator and a pH meter?
A pH meter is an ion selective electrode (H+), it gives pH to a far more accurate figure and leaves no room for interpretation (based on wetness of strip, colour may appear to show different pHs with univ. indicator
What is the chemical name for COOH?
It would appear to be a molecule of cobalt hydroxide.
What hazard sign should appear on a bottle of sodium hydroxide?
CORROSIVE
Are signs of chemical reaction always visible?
NO!!! When neutralising an acid to an alkali , both of which are clear liquids, you do not see always see the product; it may appear to be another clear liquid. e.g. Hydrochloric Acid and Sodium Hydroxide, which are clear liquids produce water a clear liquid and sodium and chloride ions which are not visible. HCl(aq) + NaOH(aq) = H2O(l) + Na^+(aq) + Cl^-(aq) What you can see, if an indicator is used, is the change of colour of the indicator. However, a rusting nail (iron) is visible, but it takes days for the appearance to change, from shiny metal to red/brown of rust.
What is the procedure for making and isolating sodium chloride from sodium carbonate?
put the mixture in water and add hydrochloric acid the carbonate becomes decomposed when no further bubbles appear by adding hydrochloric acid then heat the mixture till dryness and get the solid sodium chloride.
What is the driving force behind the six basic emotions that appear to be universal accordind to paul ekman?
The driving force behind the six basic emotions (happiness, sadness, anger, fear, disgust, surprise) identified by Paul Ekman is believed to be evolutionary adaptation for survival. Ekman suggests that these emotions are universal because they helped our ancestors respond to environmental threats and opportunities, contributing to their survival and reproduction. These emotions are thought to be hardwired in human beings and serve as adaptive responses to different situations.
End point of titration should be at pH?
A titration usually has an acid (pH 0-6) in the burette and an alkali (pH 8-14) in the conical flask below the burette. Your aim is to neutralise the two solutions by titrating them against each other.So the endpoint pH should be 7 (universal indicator/litmus paper will appear a greenish colour). The solution in the conical flask is neutral.Hope this Helps!
Effect of methyl red to acid and base?
It's an indicator that turns red with acids and yellow with bases (though I prefer to use the term alkalis).Actually, that answer is not strictly true because it will turn yellow at a pH of slightly less than pH 7 (neutral) so some weak acids will appear to be alkaline with this indicator.
What are the functions of indicators?
Indicator species are a useful management tool, and can help us delineate an ecoregion, indicate the status of an environmental condition, find a disease outbreak, or monitor pollution or climate change. In one sense, they can be used as an "early warning system" by biologists and conservation managers. Indicator species must also be accompanied by a thorough study of what is being indicated, what is really correlated, and how this one species fits into the rest of ecosystem.
If you have a 300ml of a 15 percent hydrochloric acid solution in dilute the solution to 1000ml with sterile water what percent should appear on the label?
The concentration of the diluted solution will be 15(300/1000) = 4.5 %, if the percent is expressed on a weight/volume basis.
