3 years ago

The following reaction shows sodium carbonate reacting with calcium hydroxide.

Chemistry

2 answers:

Colt1911 [192]3 years ago

7 0

Answer:

Ca = 10,63

Explanation: Let's see, these are equations, now Look at ca and ca equates to all chemical equations= 10,63

Nimfa-mama [501]3 years ago

3 0

Answer:

Its 15.1

Explanation:

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The ka of acetic acid ch3co2h is 1.8 x10-5. what is the ph

AysviL [449]

You must know the concentration of the acetic acid. Suppose the concentration is 0.1 M. The solution is as follows:

CH₃COOH → CH₃COO⁻ + H⁺
I 0.1 0 0
C -x +x +x
E 0.1 - x x x

Ka = (x)(x)/(0.1 - x)
1.8×10⁻⁵ = x²/(0.1 - x)
Solving for x,
x = 1.333×10⁻³ = H⁺

pH = -log[H⁺] = -log(1.333×10⁻³)
pH = 2.88

6 0

3 years ago

Question 3 (1 point) The extinction coefficient for copper sulfate in aqueous solution is 12 M-1.cm-1 at 800 nm. If the absorban

Troyanec [42]

Answer:

The concentration of the copper sulfate solution is 83 mM.

Explanation:

The absorbance of a copper sulfate solution can be calculated using Beer-Lambert Law:

A = ε . c . <em>l</em>

where

ε is the extinction coefficient of copper sulfate (ε = 12 M⁻¹.cm⁻¹)

c is its molar concentration (what we are looking for)