Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations

$1 .$ $60$ $m L of \frac{M}{10} H C l + 40$ $m L of \frac{M}{10} N a O H$

$2 .$ $55$ $m L of \frac{M}{10} H C l + 45$ $m L of \frac{M}{10} N a O H$

$3 .$ $75 m L of \frac{M}{5} H C l + 25$ $m L of \frac{M}{5} N a O H$

$4 .$ $100$ $m L of \frac{M}{10} H C l + 100 m L of \frac{M}{10} N a O H$

pH of which one of them will be equal to 1?

Question

Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations

1 .

60

m L of \frac{M}{10} H C l + 40

m L of \frac{M}{10} N a O H

2 .

55

m L of \frac{M}{10} H C l + 45

m L of \frac{M}{10} N a O H

3 .

75 m L of \frac{M}{5} H C l + 25

m L of \frac{M}{5} N a O H

4 .

100

m L of \frac{M}{10} H C l + 100 m L of \frac{M}{10} N a O H

pH of which one of them will be equal to 1?

Aicharya · Accepted Answer

Meq of HCl = 75 × 1 5 × 1 = 15 Meq of NaOH = 25 × 1 5 × 1 = 5 Meq of HCl in resulting solution = 10 Normality of [ H + ] in resulting mixture = 10 100 = 1 10 p H = - l o g [ H + ] = - l o g 1 10 = 1.0

Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations 1 …

Solution