A pH strip is a strip which helps in determining whether a solution is acidic or basic in nature.
That is, if a solution is acidic in nature then a pH strip will change from blue to red. Whereas when a solution is basic in nature then a pH strip will change from red to blue.
Thus, we can conclude that statement molecules in the paper react differently with hydronium and hydroxide ions, best describes how a pH test strip works.
Molecules in the paper react differently with Hydronium and Hydroxide.
pH paper deals with acidity and basicity of something. You are correct in thinking that A is the answer. Always go with your gut. don't be like me when I was in college who always second guessed my answers. Good luck with chemistry.
we know that it originally came from an animal, likely a bat. At this time, there is no evidence that animals play a significant role in spreading the virus that causesd
Mols CuSO4 = M x L = 1.50 x 0.150 = 0.225 <span>mols KOH = 3.00 x 0.150 = 0.450 </span> <span>specific heat solns = specific heat H2O = 4.18 J/K*C </span>
<span>CuSO4 + 2KOH = Cu(OH)2 + 2H2O </span> <span>q = mass solutions x specific heat solns x (Tfinal-Tinitial) + Ccal*deltat T </span> <span>q = 300g x 4.18 x (31.3-25.2) + 24.2*(31.3-25.2) </span> <span>dHrxn in J/mol= q/0.225 mol CuSO4 </span> <span>Then convert to kJ/mol