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Describe how to test for and identify halide ions in a solution.

First acidify the solution using dilute nitric acid, then add silver nitrate. The silver ions should react with the halide ions to form a precipitate, with colour depending on which halide ion is present:Chl...
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Answered by Connor C. • Chemistry tutor
5987 Views

Find the range of a degree-2 polynomial function such as 2x^2 +1, or x^2 + 2x - 3.

There are 3 methods for finding the range of a polynomial fucntion. This is good news because if you arrive at the same answer using these methods you wil be more confident that it is the correct answer.The ...
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Answered by Douglas H. • Maths tutor
3894 Views

What is the different between the preterite and imperfect tense?

Conjugation is not as common in English as it is in Spanish, especially in the past tense. Unlike English, there are two versions of the Spanish past tense called the Preterite and Imperfect tense, each with...
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Answered by Anna R. • Spanish tutor
3199 Views

What is the double angle formula?

The double angle formula is how to combine/split trigonometric functions so that they can be integrated or simplified using identities. For example, cos (a+b)= cos(a)cos(b) - sin(a)sin(b) , which can be exte...
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Answered by Robert W. • Maths tutor
5011 Views

Write equations for the reaction of propanoic acid with methanol and name any organic products.

This reaction is the formation of an ester because the reactants are a carboxylic acid and an alcohol. Propanoic acid has 3 carbons and will have the functional group COOH: CH 3 CH 2 COOH Methanol has 1 carb...
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Answered by Bethan H. • Chemistry tutor
38537 Views