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What is a titration reaction in acid-base chemistry?

A titration reaction is used to calculate the conentration of an acid or alkali. The two solutions are combined, one of known and one of unknown concentration. When combined the hydrogen ions from the acid a...
HS
Answered by Hatem S. • Chemistry tutor
3498 Views

Find the general solution to y''+2y'-3y=x

y''=d 2 y/dx 2 , y'=dy/dx for ease of writing First off split the full equation into th homogeneous equation and the particular function. The homogenous equatiion is when our collection of y, y', y'' are on ...
ZG
8694 Views

What is the difference between the preterite tense and the imperfect tense?

The preterite is used to describe events that happened only once and have finished. e.g. Antonio hizo sus deberes = Antonio did his homework (only once) The imperfect, on the other hand, is used to describe ...
EP
Answered by Ed P. • Spanish tutor
2093 Views

Solve algabraically: 6a+b=16 and 5a-2b=19

To answer this we want to split up the 'a' parts and 'b' parts of the question and answer them seperately because we can't answer the question with two letters. We can change one equation to b=16-6a and now ...
AS
Answered by Anna S. • Maths tutor
5673 Views

How can I show a basic understanding of the Subjunctive in Spanish?

The subjunctive (el subjuntivo) is a mood, not a tense and it is used frequently in Spanish. It can be used to describe past events with the imperfect subjunctive, or present events with the present subjunct...
GF
Answered by Georgina F. • Spanish tutor
2842 Views