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postnew [5]
3 years ago
7

Which two solutions, when mixed together, will undergo a double replacement reaction and form a white, solid substance

Chemistry
2 answers:
Scrat [10]3 years ago
5 0

Which two solutions, when mixed together, will undergo a double replacement reaction and form a white, solid substance?


1. NaCl(aq) and LiNO3(aq)

2. KCl(aq) and AgNO3(aq)  answer

3. KCl(aq) and LiCL(aq)

4. NaNO3(aq) and AgNO3(aq)


2 is the answer because AgCl is formed and that is a white ppt.

Minchanka [31]3 years ago
4 0

examine all the possible products

of those only AgCl is insoluble

so the answer is (D)

NaNO3(aq) + AgNO3(aq) → NaNO3(aq) + AgCl(s)



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Describe the movement of electrons when the atom colors by applying ground state and excitement state?
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5 0
3 years ago
Calculate the pH of a buffer solution prepared by dissolving 0.20 mole of cyanic acid (HCNO) and 0.80 mole of sodium cyanate (Na
Afina-wow [57]

The pH of a buffer solution : 4.3

<h3>Further explanation</h3>

Given

0.2 mole HCNO

0.8 mole NaCNO

1 L solution

Required

pH buffer

Solution

Acid buffer solutions consist of weak acids HCNO and their salts NaCNO.

\tt \displaystyle [H^+]=Ka\times\frac{mole\:weak\:acid}{mole\:salt\times valence}

valence according to the amount of salt anion  

Input the value :

\tt \displaystyle [H^+]=2.10^{-4}\times\frac{0.2}{0.8\times 1}\\\\(H^+]=5\times 10^{-5}\\\\pH=5-log~5\\\\pH=4.3

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3 years ago
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